qsocks5socketengine: use qintptr when referring to socket descs

One patch from many years ago already did most of it, but the key of
the hash was still int.

Change-Id: I557fa19d2573addbef7557d1a16fdd6554a117cc
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/network/socket/qsocks5socketengine.cpp

@@ -325,7 +325,7 @@ protected:
     QRecursiveMutex mutex;
     int sweepTimerId = -1;
     //socket descriptor, data, timestamp
-    QHash<int, QSocks5BindData *> store;
+    QHash<qintptr, QSocks5BindData *> store;
 };
 
 Q_GLOBAL_STATIC(QSocks5BindStore, socks5BindStore)