Add defaults to switch statements to avoid many warnings about unhandled enum values

src/qt/anybutton.cpp

@@ -69,6 +69,9 @@ bool wxQtPushButton::event(QEvent* e)
     case QEvent::FocusIn:
     case QEvent::FocusOut:
         GetHandler()->QtUpdateState();
+        break;
+    default:
+        break;
     }
 
     return QPushButton::event(e);

src/qt/dnd.cpp

@@ -37,6 +37,8 @@ wxDragResult DropActionToDragResult(Qt::DropAction action)
             return wxDragMove;
         case Qt::LinkAction:
             return wxDragLink;
+        default:
+            break;
     }
 
     wxFAIL_MSG("Illegal drop action");

src/qt/menu.cpp

@@ -115,6 +115,8 @@ static void InsertMenuItemAction( const wxMenu *menu, const wxMenuItem *previous
             }
             break;
         }
+        default:
+            break;
     }
     // Insert the action into the actual menu:
     QAction *successiveItemAction = ( successiveItem != NULL ) ? successiveItem->GetHandle() : NULL;