free dbus errors when inhibiting freedesktop screensaver (prevents small memory leak)

platform/linuxbsd/freedesktop_screensaver.cpp

@@ -50,6 +50,7 @@ void FreeDesktopScreenSaver::inhibit() {
 
 	DBusConnection *bus = dbus_bus_get(DBUS_BUS_SESSION, &error);
 	if (dbus_error_is_set(&error)) {
+		dbus_error_free(&error);
 		unsupported = true;
 		return;
 	}
@@ -72,6 +73,7 @@ void FreeDesktopScreenSaver::inhibit() {
 	DBusMessage *reply = dbus_connection_send_with_reply_and_block(bus, message, 50, &error);
 	dbus_message_unref(message);
 	if (dbus_error_is_set(&error)) {
+		dbus_error_free(&error);
 		dbus_connection_unref(bus);
 		unsupported = false;
 		return;
@@ -96,6 +98,7 @@ void FreeDesktopScreenSaver::uninhibit() {
 
 	DBusConnection *bus = dbus_bus_get(DBUS_BUS_SESSION, &error);
 	if (dbus_error_is_set(&error)) {
+		dbus_error_free(&error);
 		unsupported = true;
 		return;
 	}
@@ -110,6 +113,7 @@ void FreeDesktopScreenSaver::uninhibit() {
 
 	DBusMessage *reply = dbus_connection_send_with_reply_and_block(bus, message, 50, &error);
 	if (dbus_error_is_set(&error)) {
+		dbus_error_free(&error);
 		dbus_connection_unref(bus);
 		unsupported = true;
 		return;