Handle SDL event 0x302 by doing nothing

components/sdlutil/sdlinputwrapper.cpp

@@ -102,6 +102,8 @@ InputWrapper::InputWrapper(SDL_Window* window, osg::ref_ptr<osgViewer::Viewer> v
                     if (evt.key.keysym.sym == SDLK_F3)
                         mViewer->getEventQueue()->keyRelease(osgGA::GUIEventAdapter::KEY_F3);
 
+                    break;
+                case SDL_TEXTEDITING:
                     break;
                 case SDL_TEXTINPUT:
                     mKeyboardListener->textInput(evt.text);