Coverity issues:

129097
129098
129099
129101
129102
129132
129134
129203

src/Gui/GuiApplication.cpp

@@ -70,7 +70,7 @@ GUIApplication::~GUIApplication()
 
 bool GUIApplication::notify (QObject * receiver, QEvent * event)
 {
-    if (!receiver && event) {
+    if (!receiver) {
         Base::Console().Log("GUIApplication::notify: Unexpected null receiver, event type: %d\n",
             (int)event->type());
     }