Fix stack balancing problems by refactoring execution calls

- Con::executef now uses a template
- All public execution functions now restore the console stack upon return
- Fixed bad parameters on some callbacks
- Reverts get*Arg behavior

Engine/source/gui/editor/inspector/customField.cpp

@@ -20,6 +20,8 @@
 // IN THE SOFTWARE.
 //-----------------------------------------------------------------------------
 
+#include "console/simBase.h"
+#include "console/engineAPI.h"
 #include "gui/editor/inspector/customField.h"
 #include "gui/editor/guiInspector.h"
 

Engine/source/gui/editor/inspector/field.cpp

@@ -269,7 +269,7 @@ void GuiInspectorField::setData( const char* data, bool callbacks )
          {
             char buffer[ 2048 ];
             expandEscape( buffer, newValue );
-            newValue = Con::evaluatef( "%%f = \"%s\"; return ( %s );", oldValue.c_str(), buffer );
+            newValue = (const char*)Con::evaluatef( "%%f = \"%s\"; return ( %s );", oldValue.c_str(), buffer );
          }
          else if(    type == TypeS32Vector
                   || type == TypeF32Vector