UI: Use int return type in OBSIgnoreWheelProxyStyle

UI/obs-proxy-style.cpp

@@ -84,7 +84,7 @@ int OBSIgnoreWheelProxyStyle::styleHint(StyleHint hint,
 {
 #if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
 	if (hint == SH_ComboBox_AllowWheelScrolling)
-		return false;
+		return 0;
 #endif
 
 	return QProxyStyle::styleHint(hint, option, widget, returnData);