Fix qHash-related size compatibility warnings by MSVC

Change-Id: I3b7981ce78b67db4b996f99682284a0b911d8cd7
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/texteditor/texteditor.h

@@ -41,6 +41,7 @@
 #include <utils/elidinglabel.h>
 #include <utils/link.h>
 #include <utils/multitextcursor.h>
+#include <utils/porting.h>
 #include <utils/uncommentselection.h>
 
 #include <QPlainTextEdit>
@@ -685,6 +686,6 @@ private:
 
 QT_BEGIN_NAMESPACE
 
-uint qHash(const QColor &color);
+Utils::QHashValueType qHash(const QColor &color);
 
 QT_END_NAMESPACE