Fixed error return values in filesystem test program.

test/testfilesystem.c

@@ -32,9 +32,8 @@ main(int argc, char *argv[])
     if(base_path == NULL){
       SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find base path: %s\n",
                    SDL_GetError());
-      return 0;
+      return 1;
     }
-
     SDL_Log("base path: '%s'\n", base_path);
     SDL_free(base_path);
 
@@ -42,7 +41,7 @@ main(int argc, char *argv[])
     if(pref_path == NULL){
       SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't find pref path: %s\n",
                    SDL_GetError());
-      return 0;
+      return 1;
     }
     SDL_Log("pref path: '%s'\n", pref_path); 
     SDL_free(pref_path);