Detect MSYS if MSYSTEM is MINGW64

Author: gnawybol

virtualenvwrapper.sh

@@ -64,7 +64,7 @@ fi
 
 # Define script folder depending on the platorm (Win32/Unix)
 VIRTUALENVWRAPPER_ENV_BIN_DIR="bin"
-if [ "$OS" = "Windows_NT" ] && [ "$MSYSTEM" = "MINGW32" ]
+if [ "$OS" = "Windows_NT" ] && ([ "$MSYSTEM" = "MINGW32" ] || [ "$MSYSTEM" = "MINGW64" ])
 then
     # Only assign this for msys, cygwin use standard Unix paths
     # and its own python installation

virtualenvwrapper/user_scripts.py

@@ -18,7 +18,7 @@
 # Are we running under msys
 if sys.platform == 'win32' and \
    os.environ.get('OS') == 'Windows_NT' and \
-   os.environ.get('MSYSTEM') == 'MINGW32':
+   os.environ.get('MSYSTEM') in ('MINGW32', 'MINGW64'):
     is_msys = True
     script_folder = 'Scripts'
 else: