Merge pull request godotengine#94506 from Jordyfel/handle-gltf-bin-missing

Fix handling of missing bin file in gltf separate

Author: akien-mga

modules/gltf/gltf_document.cpp

@@ -789,8 +789,9 @@ Error GLTFDocument::_parse_buffers(Ref<GLTFState> p_state, const String &p_base_
 					ERR_FAIL_COND_V(p_base_path.is_empty(), ERR_INVALID_PARAMETER);
 					uri = uri.uri_decode();
 					uri = p_base_path.path_join(uri).replace("\\", "/"); // Fix for Windows.
+					ERR_FAIL_COND_V_MSG(!FileAccess::exists(uri), ERR_FILE_NOT_FOUND, "glTF: Binary file not found: " + uri);
 					buffer_data = FileAccess::get_file_as_bytes(uri);
-					ERR_FAIL_COND_V_MSG(buffer.is_empty(), ERR_PARSE_ERROR, "glTF: Couldn't load binary file as an array: " + uri);
+					ERR_FAIL_COND_V_MSG(buffer_data.is_empty(), ERR_PARSE_ERROR, "glTF: Couldn't load binary file as an array: " + uri);
 				}
 
 				ERR_FAIL_COND_V(!buffer.has("byteLength"), ERR_PARSE_ERROR);