Utils: Rename winQPidToPid to qPidToPid

... and make it a no-op on non-Windows. Saves #ifdefs.

Change-Id: Ie791f7b9f1a425325d0b889e73758c5f7f7e6ad2
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

src/libs/utils/qtcprocess.h

@@ -155,6 +155,10 @@ private:
 #endif
 };
 
-}
+// Converts the Q_PID into a integer value. This is a no-op
+// except on Windows.
+QTCREATOR_UTILS_EXPORT unsigned long qPidToPid(const Q_PID qpid);
+
+} // namespace Utils
 
 #endif // QTCPROCESS_H