Fixed memory leak in game controller test program.

test/testgamecontroller.c

@@ -181,6 +181,8 @@ WatchGameController(SDL_GameController * gamecontroller)
     window = SDL_CreateWindow(title, SDL_WINDOWPOS_CENTERED,
                               SDL_WINDOWPOS_CENTERED, SCREEN_WIDTH,
                               SCREEN_HEIGHT, 0);
+    SDL_free(title);
+    title = NULL;
     if (window == NULL) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create window: %s\n", SDL_GetError());
         return SDL_FALSE;