more error checking around images, should prevent vram leaks

src/message_image_loader.cpp

@@ -103,10 +103,17 @@ TextureLoaderResult MessageImageLoader::load(TextureUploaderI& tu, Message3Handl
 		new_entry.current_texture = 0;
 		for (const auto& [ms, data] : res.frames) {
 			const auto n_t = tu.upload(data.data(), res.width, res.height);
+			if (n_t == 0) {
+				continue;
+			}
 			new_entry.textures.push_back(n_t);
 			new_entry.frame_duration.push_back(ms);
 		}
 
+		if (new_entry.textures.empty()) {
+			continue;
+		}
+
 		new_entry.width = res.width;
 		new_entry.height = res.height;
 

src/texture_cache.hpp

@@ -116,6 +116,9 @@ struct TextureCache {
 				_tu.destroy(tex_id);
 			}
 		}
+		for (const auto& tex_id : _default_texture.textures) {
+			_tu.destroy(tex_id);
+		}
 	}
 
 	struct GetInfo {