testcamera: SDL_AppQuit destroys state and SDL

This fixes a double-free of SDLTest_CommonState

test/testcamera.c

@@ -97,8 +97,6 @@ SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
                 NULL,
             };
             SDLTest_CommonLogUsage(state, argv[0], options);
-            SDL_Quit();
-            SDLTest_CommonDestroyState(state);
             return SDL_APP_FAILURE;
         }
         i += consumed;