Implemented the core functionality of the ObjectStore and started

implementing the functionality for the AssetManager

src/Window.c

@@ -9,6 +9,10 @@
 
 bool init_window(Window *wnd, const char *title, int width, int height,
                  bool full_screen) {
+  if (!wnd) {
+    return false;
+  }
+
   Uint32 window_flags = SDL_WINDOW_ALLOW_HIGHDPI;
 
   if (full_screen) {
@@ -43,10 +47,20 @@ bool init_window(Window *wnd, const char *title, int width, int height,
 }
 
 void fill_window_with_color(const Window *wnd, SDL_Color color) {
+  if (!wnd) {
+    return;
+  }
+
   render_clear(wnd->renderer, color);
 }
 
-void swap_render_buffers(const Window *wnd) { swap_buffers(wnd->renderer); }
+void swap_render_buffers(const Window *wnd) {
+  if (!wnd) {
+    return;
+  }
+
+  swap_buffers(wnd->renderer);
+}
 
 void destroy_window(Window *wnd) {
   if (!wnd) {