Fix bug with calculating delta in release build

src/GameEngine.c

@@ -139,9 +139,6 @@ bool init_engine(const char *game_name, WindowSize window_size,
 
 #if DEBUG_ENGINE
   GameEngine.delta = 1.0f / 60.0f;
-#endif /* DEBUG_ENGINE */
-
-#if DEBUG_ENGINE
   printf("Game initialised successfully\n");
 #endif /* DEBUG_ENGINE */
 
@@ -825,7 +822,7 @@ void update() {
 
   u64 current_time = SDL_GetTicks64();
 
-#ifndef DEBUG_ENGINE
+#if !DEBUG_ENGINE
   // Get the delta time in seconds since the SDL_GetTicks64() returns the
   // time in milliseconds
   GameEngine.delta = (current_time - GameEngine.last_time) / 1000.0f;