decklink-output-ui: Fix memory leak

Closes obsproject/obs-studio#1656

UI/frontend-plugins/decklink-output-ui/decklink-ui-main.cpp

@@ -17,7 +17,7 @@ obs_output_t *output;
 
 OBSData load_settings()
 {
-	char *path = obs_module_get_config_path(obs_current_module(),
+	BPtr<char> path = obs_module_get_config_path(obs_current_module(),
 			"decklinkOutputProps.json");
 	BPtr<char> jsonData = os_quick_read_utf8_file(path);
 	if (!!jsonData) {