Fix unicode invalid skip error in AssetLib

(cherry picked from commit 0caaaf4018feddb1d3e6e75870df282715efd276)

core/io/http_client.cpp

@@ -662,6 +662,7 @@ PoolByteArray HTTPClient::read_response_body_chunk() {
 				}
 			}
 			if (err != OK) {
+				ret.resize(_offset);
 				break;
 			}
 		}