Add single TQObject root parent for all guarded pointers.

This helps keeping the object root list shorter, speeding up operations
which require lot of TQObject trees. This relates to TDE/tdebase#309.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

src/kernel/qguardedptr.cpp

@@ -194,9 +194,10 @@
 
 /* Internal classes */
 
+static TQObject *__ptrpriv_root_obj = new TQObject(0, "_ptrpriv_root");
 
 TQGuardedPtrPrivate::TQGuardedPtrPrivate( TQObject* o)
-    : TQObject(0, "_ptrpriv" ), obj( o )
+    : TQObject(__ptrpriv_root_obj, "_ptrpriv" ), obj( o )
 {
     if ( obj )
 	connect( obj, SIGNAL( destroyed() ), this, SLOT( objectDestroyed() ) );