Options row causes crash in specific cases

[TigerWolf]

If you use an options row like so:

  title: "Type",
        rows: [{
          title: "Type",
          key: :type,
          type: :options,
          items: ["Pushes", "Squat", "Km", "Stairs"]
          },{

then the app crashes.

If I change "Pushes" to "Push" - it doesn't crash. "aPu" also crashes. I cant define a pattern of an easily testable problem.

then the the app crashes on:
https://github.com/clayallsopp/formotion/blob/master/lib/formotion/row_type/options_row.rb#L14

2014-09-07 19:06:06.757 FitnessChallenge[85250:70b] options_row.rb:14:in `build_cell:': can't convert nil into Integer (TypeError)
    from row_cell_builder.rb:38:in `make_cell:'
    from row.rb:356:in `make_cell'
    from form_delegate.rb:67:in `tableView:cellForRowAtIndexPath:'
2014-09-07 19:06:06.758 FitnessChallenge[85250:70b] options_row.rb:14:in `build_cell:': can't convert nil into Integer (TypeError)
    from row_cell_builder.rb:38:in `make_cell:'
    from row.rb:356:in `make_cell'
    from form_delegate.rb:67:in `tableView:cellForRowAtIndexPath:'
2014-09-07 19:06:06.764 FitnessChallenge[85250:70b] *** Terminating app due to uncaught exception 'TypeError', reason: 'options_row.rb:14:in `build_cell:': can't convert nil into Integer (TypeError)
    from row_cell_builder.rb:38:in `make_cell:'
    from row.rb:356:in `make_cell'
    from form_delegate.rb:67:in `tableView:cellForRowAtIndexPath:'
'
*** First throw call stack:
(
    0   CoreFoundation                      0x026fb1e4 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x00b228e5 objc_exception_throw + 44
    2   FitnessChallenge                    0x007380aa _ZL10__vm_raisev + 346
    3   FitnessChallenge                    0x00738188 rb_vm_raise + 216
    4   FitnessChallenge                    0x006393c1 rb_exc_raise + 17
    5   FitnessChallenge                    0x00632882 rb_raise + 146
    6   FitnessChallenge                    0x0066f940 rb_cstr_to_dbl + 0
    7   FitnessChallenge                    0x0066f630 rb_Integer + 16
    8   FitnessChallenge                    0x000610be vm_rval_to_int + 334
    9   FitnessChallenge                    0x0006acbf __unnamed_262 + 47
    10  FitnessChallenge                    0x00712899 rb_vm_dispatch + 5913
    11  FitnessChallenge                    0x0050ffdc vm_dispatch + 1100
    12  FitnessChallenge                    0x00518124 rb_scope__build_cell:__ + 1364
    13  FitnessChallenge                    0x0072c3dd _ZL20dispatch_rimp_callerPFP11objc_objectS0_P13objc_selectorzEmS1_iPKm + 46445
    14  FitnessChallenge                    0x00712d3a rb_vm_dispatch + 7098
    15  FitnessChallenge                    0x0044bd6c vm_dispatch + 1100
    16  FitnessChallenge                    0x004542ec rb_scope__make_cell:__ + 3020
    17  FitnessChallenge                    0x0072c3dd _ZL20dispatch_rimp_callerPFP11objc_objectS0_P13objc_selectorzEmS1_iPKm + 46445
    18  FitnessChallenge                    0x00712d3a rb_vm_dispatch + 7098
    19  FitnessChallenge                    0x004389ac vm_dispatch + 1100
    20  FitnessChallenge                    0x0044655e rb_scope__make_cell__ + 1070
    21  FitnessChallenge                    0x0072c3dd _ZL20dispatch_rimp_callerPFP11objc_objectS0_P13objc_selectorzEmS1_iPKm + 46445
    22  FitnessChallenge                    0x00712d3a rb_vm_dispatch + 7098
    23  FitnessChallenge                    0x003e6eec vm_dispatch + 1100
    24  FitnessChallenge                    0x003f0cfe rb_scope__tableView:cellForRowAtIndexPath:__ + 462
    25  FitnessChallenge                    0x003f0e0f __unnamed_57 + 95
    26  UIKit                               0x0185811f -[UITableView _createPreparedCellForGlobalRow:withIndexPath:] + 412
    27  UIKit                               0x018581f3 -[UITableView _createPreparedCellForGlobalRow:] + 69
    28  UIKit                               0x01839ece -[UITableView _updateVisibleCellsNow:] + 2428
    29  UIKit                               0x0184e6a5 -[UITableView layoutSubviews] + 213
    30  UIKit                               0x017ce964 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 355
    31  libobjc.A.dylib                     0x00b3482b -[NSObject performSelector:withObject:] + 70
    32  QuartzCore                          0x0349045a -[CALayer layoutSublayers] + 148
    33  QuartzCore                          0x03484244 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
    34  QuartzCore                          0x034840b0 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26
    35  QuartzCore                          0x033ea7fa _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 294
    36  QuartzCore                          0x033ebb85 _ZN2CA11Transaction6commitEv + 393
    37  QuartzCore                          0x033ec258 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 92
    38  CoreFoundation                      0x026c336e __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
    39  CoreFoundation                      0x026c32bf __CFRunLoopDoObservers + 399
    40  CoreFoundation                      0x026a1254 __CFRunLoopRun + 1076
    41  CoreFoundation                      0x026a09d3 CFRunLoopRunSpecific + 467
    42  CoreFoundation                      0x026a07eb CFRunLoopRunInMode + 123
    43  GraphicsServices                    0x04f015ee GSEventRunModal + 192
    44  GraphicsServices                    0x04f0142b GSEventRun + 104
    45  UIKit                               0x0175ff9b UIApplicationMain + 1225
    46  FitnessChallenge                    0x00028b34 main + 212
    47  libdyld.dylib                       0x03cfd701 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type TypeError