Fix slider draw hang

src/styles/qcommonstyle.cpp

@@ -393,6 +393,8 @@ QStyleControlElementData populateControlElementDataFromWidget(const QWidget* wid
 			const QSlider *sl = dynamic_cast<const QSlider*>(widget);
 			if (sl) {
 				ceData.orientation = sl->orientation();
+				ceData.minSteps = sl->minValue();
+				ceData.maxSteps = sl->maxValue();
 				ceData.tickMarkSetting = sl->tickmarks();
 				ceData.tickInterval = sl->tickInterval();
 				ceData.currentStep = sl->value();