Use qintptr instead of long when building against Qt6

SuspendResume/SuspendResume_Windows.cpp

@@ -24,7 +24,7 @@ SuspendResumeListener::~SuspendResumeListener()
     QCoreApplication::instance()->removeNativeEventFilter(this);
 }
 
-bool SuspendResumeListener::nativeEventFilter(const QByteArray &event_type, void *message, long *result)
+bool SuspendResumeListener::nativeEventFilter(const QByteArray &event_type, void *message, NEFResultType *result)
 {
     (void)result;
     if(event_type == "windows_generic_MSG")

SuspendResume/SuspendResume_Windows.h

@@ -15,6 +15,12 @@
 #include <QByteArray>
 #include "SuspendResume.h"
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+#define NEFResultType long
+#else
+#define NEFResultType qintptr
+#endif
+
 class SuspendResumeListener : public SuspendResumeListenerBase, private QAbstractNativeEventFilter
 {
 protected:
@@ -22,5 +28,5 @@ protected:
     virtual ~SuspendResumeListener();
 
 private:
-    bool nativeEventFilter(const QByteArray &event_type, void *message, long *result);
+    bool nativeEventFilter(const QByteArray &event_type, void *message, NEFResultType *result);
 };