Fix return value of GLib event dispatcher socketNotifierSourceCheck

The wrong return value didn't seem to result in observable bugs.

Change-Id: Iaba74d0acd4352af9be70498a7d5556bb1e02f5f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/kernel/qeventdispatcher_glib.cpp

@@ -88,7 +88,7 @@ static gboolean socketNotifierSourceCheck(GSource *source)
             p->socketNotifier->setEnabled(false);
             i--;
         } else {
-            pending = ((p->pollfd.revents & p->pollfd.events) != 0);
+            pending = pending || ((p->pollfd.revents & p->pollfd.events) != 0);
         }
     }