Fix gcc compilation issue

For fedora os-like, you have compilation issue:

"""bash
error: format not a string literal and no format arguments [-Werror=format-security]
"""

it's come from code like:

"""c++
fprintf(stderr,err.ascii());
"""

to avoid that use fix like:

"""c++
fprintf(stderr, "%s", err.ascii());
"""

rdadmin/rdadmin.cpp

@@ -71,7 +71,7 @@ void PrintError(const QString &str,bool interactive)
     QMessageBox::warning(NULL,QObject::tr("RDAdmin Error"),str);
   }
   else {
-    fprintf(stderr,QString().sprintf("rdadmin: %s\n",(const char *)str));
+    fprintf(stderr,"%s",QString().sprintf("rdadmin: %s\n",(const char *)str));
   }
 }
 

tests/datedecode_test.cpp

@@ -85,7 +85,7 @@ MainObject::MainObject(QObject *parent)
   //
   QString err (tr("datedecode_test: "));
   if(!RDOpenDb(&schema,&err,config)) {
-    fprintf(stderr,err.ascii());
+    fprintf(stderr,"%s", err.ascii());
     delete cmd;
     exit(256);
   }

tests/log_unlink_test.cpp

@@ -90,7 +90,7 @@ MainObject::MainObject(QObject *parent)
   //
   QString err (tr("upload_test: "));
   if(!RDOpenDb(&schema,&err,test_config)) {
-    fprintf(stderr,err.ascii());
+    fprintf(stderr,"%s", err.ascii());
     delete cmd;
     exit(256);
   }

tests/reserve_carts_test.cpp

@@ -94,7 +94,7 @@ MainObject::MainObject(QObject *parent)
   //
   QString err (tr("upload_test: "));
   if(!RDOpenDb(&schema,&err,config)) {
-    fprintf(stderr,err.ascii());
+    fprintf(stderr,"%s", err.ascii());
     delete cmd;
     exit(256);
   }

utils/rdalsaconfig/rdalsamodel.cpp

@@ -277,7 +277,7 @@ bool RDAlsaModel::saveConfig(const QString &filename)
     return false;
   }
   for(int i=0;i<model_other_lines.size();i++) {
-    fprintf(f,model_other_lines.at(i));
+    fprintf(f,"%s", model_other_lines.at(i));
   }
   fprintf(f,"%s\n",START_MARKER);
   for(int i=0;i<model_alsa_cards.size();i++) {