UI: Use input validator on resolution line edit in adv tab

UI/window-basic-settings.cpp

@@ -916,6 +916,9 @@ OBSBasicSettings::OBSBasicSettings(QWidget *parent)
 	QValidator *validator = new QRegularExpressionValidator(rx, this);
 	ui->baseResolution->lineEdit()->setValidator(validator);
 	ui->outputResolution->lineEdit()->setValidator(validator);
+	ui->advOutRescale->lineEdit()->setValidator(validator);
+	ui->advOutRecRescale->lineEdit()->setValidator(validator);
+	ui->advOutFFRescale->lineEdit()->setValidator(validator);
 
 	connect(ui->useStreamKeyAdv, SIGNAL(clicked()), this,
 		SLOT(UseStreamKeyAdvClicked()));