Allow session manager to be disable on creation when argc and argv are not passed to TDEApplication

This relates to Bug 760
(cherry picked from commit 7cc3a975d2)

kdecore/kapplication.cpp

@@ -679,6 +679,33 @@ KApplication::KApplication( int& argc, char** argv, const TQCString& rAppName,
     d->m_KAppDCOPInterface = new KAppDCOPInterface(this);
 }
 
+KApplication::KApplication( bool allowStyles, bool GUIenabled, bool SMenabled ) :
+//  TQApplication( *KCmdLineArgs::qt_argc(), *KCmdLineArgs::qt_argv(), TRUE ),	// Qt4 requires that there always be a GUI
+  TQApplication( *KCmdLineArgs::qt_argc(), *KCmdLineArgs::qt_argv(), GUIenabled, SMenabled ),	// We need to be able to run command line apps
+  KInstance( KCmdLineArgs::about),
+#ifdef Q_WS_X11
+  display(0L),
+  argb_visual(false),
+#endif
+  d (new KApplicationPrivate)
+{
+    aIconPixmap.pm.icon = 0L;
+    aIconPixmap.pm.miniIcon = 0L;
+    read_app_startup_id();
+    if (!GUIenabled)
+       allowStyles = false;
+    useStyles = allowStyles;
+    setName( instanceName() );
+
+    installSigpipeHandler();
+    parseCommandLine( );
+    init(GUIenabled);
+    d->m_KAppDCOPInterface = new KAppDCOPInterface(this);
+}
+
+// FIXME
+// FOR BINARY COMPATIBILITY ONLY
+// REMOVE WHEN PRACTICAL!
 KApplication::KApplication( bool allowStyles, bool GUIenabled ) :
 //  TQApplication( *KCmdLineArgs::qt_argc(), *KCmdLineArgs::qt_argv(), TRUE ),	// Qt4 requires that there always be a GUI
   TQApplication( *KCmdLineArgs::qt_argc(), *KCmdLineArgs::qt_argv(), GUIenabled ),	// We need to be able to run command line apps

kdecore/kapplication.h

@@ -128,7 +128,14 @@ public:
    * @param GUIenabled Set to false to disable all GUI stuff. This implies
    * no styles either.
    */
+  KApplication( bool allowStyles=true, bool GUIenabled=true, bool SMenabled=true);
+
+#ifdef TDEAPPLICATION_BINARY_COMPAT_HACK
+  // FIXME
+  // FOR BINARY COMPATIBILITY ONLY
+  // REMOVE WHEN PRACTICAL!
   KApplication( bool allowStyles=true, bool GUIenabled=true);
+#endif // TDEAPPLICATION_BINARY_COMPAT_HACK
 
 #ifdef Q_WS_X11
   /**