Remove deprecation warning while building with Qt 5.15. (#344)

Co-authored-by: Rodrigo Oliva <[email protected]>

Author: rolivav

src/DockOverlay.cpp

@@ -806,7 +806,7 @@ void CDockOverlayCross::setIconColors(const QString& Colors)
 		{"Arrow", CDockOverlayCross::ArrowColor},
 		{"Shadow", CDockOverlayCross::ShadowColor}};
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
+#if (QT_VERSION < QT_VERSION_CHECK(5, 14, 0))
     auto SkipEmptyParts = QString::SkipEmptyParts;
 #else
     auto SkipEmptyParts = Qt::SkipEmptyParts;