Pointer as bool (libsdl-org#7214)

test/testfilesystem.c

@@ -23,7 +23,7 @@ int main(int argc, char *argv[])
 
     /* Initialize test framework */
     state = SDLTest_CommonCreateState(argv, 0);
-    if (state == NULL) {
+    if (!state) {
         return 1;
     }
 
@@ -41,7 +41,7 @@ int main(int argc, char *argv[])
     }
 
     base_path = SDL_GetBasePath();
-    if (base_path == NULL) {
+    if (!base_path) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find base path: %s\n",
                      SDL_GetError());
     } else {
@@ -50,7 +50,7 @@ int main(int argc, char *argv[])
     }
 
     pref_path = SDL_GetPrefPath("libsdl", "test_filesystem");
-    if (pref_path == NULL) {
+    if (!pref_path) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find pref path: %s\n",
                      SDL_GetError());
     } else {
@@ -59,7 +59,7 @@ int main(int argc, char *argv[])
     }
 
     pref_path = SDL_GetPrefPath(NULL, "test_filesystem");
-    if (pref_path == NULL) {
+    if (!pref_path) {
         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find pref path without organization: %s\n",
                      SDL_GetError());
     } else {