Pointer as bool (libsdl-org#7214)

test/testhittesting.c

@@ -80,7 +80,7 @@ int main(int argc, char **argv)
 
     /* Initialize test framework */
     state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
-    if (state == NULL) {
+    if (!state) {
         return 1;
     }
 
@@ -140,7 +140,7 @@ int main(int argc, char **argv)
                 if (e.key.keysym.sym == SDLK_ESCAPE) {
                     done = 1;
                 } else if (e.key.keysym.sym == SDLK_x) {
-                    if (areas == NULL) {
+                    if (!areas) {
                         areas = drag_areas;
                         numareas = SDL_arraysize(drag_areas);
                     } else {