fix(sdl): use stdlib malloc/free for framebuffer allocation

src/dev/sdl/lv_sdl_window.c

@@ -375,8 +375,8 @@ static void release_disp_cb(lv_event_t * e)
     SDL_DestroyTexture(dsc->texture);
     SDL_DestroyRenderer(dsc->renderer);
     SDL_DestroyWindow(dsc->window);
-    if(dsc->fb1) lv_free(dsc->fb1);
-    if(dsc->fb2) lv_free(dsc->fb2);
+    if(dsc->fb1) free(dsc->fb1);
+    if(dsc->fb2) free(dsc->fb2);
     lv_free(dsc);
     lv_display_set_driver_data(disp, NULL);
 }

src/lv_init.c

@@ -300,6 +300,8 @@ void lv_deinit(void)
         return;
     }
 
+    if(lv_deinit_in_progress) return;
+
     lv_deinit_in_progress = true;
 
 #if LV_USE_SYSMON