Change a QList of pointers to QVector

QList of pointers is optimum, but QVector should provide the same
performance (we aren't using the beginning-of-list feature that QList
has and QVector doesn't).

But since we're using QVector elsewhere, this should be better.

Change-Id: I39cc61d0d59846ab8c23ffff14241c6715e2eb00
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>

src/dbus/qdbusconnection_p.h

@@ -174,7 +174,7 @@ public:
     typedef QMultiHash<QString, SignalHook> SignalHookHash;
     typedef QHash<QString, QDBusMetaObject* > MetaObjectHash;
     typedef QHash<QByteArray, int> MatchRefCountHash;
-    typedef QList<QDBusPendingCallPrivate*> PendingCallList;
+    typedef QVector<QDBusPendingCallPrivate*> PendingCallList;
 
     struct WatchedServiceData {
         WatchedServiceData() : refcount(0) {}