fdo#74519 - don't drag around and use an uninitialized variable.

Change-Id: I08b43a6658a600398b434a0c90e0e16863402b33

sd/source/ui/dlg/PaneDockingWindow.cxx

@@ -109,7 +109,7 @@ void PaneDockingWindow::SetValidSizeRange (const Range aValidSizeRange)
         // to compensate the valid size range for that.
         const SvBorder aBorder (GetDecorationBorder());
         sal_Int32 nCompensation (pSplitWindow->IsHorizontal()
-            ? mnTitleBarHeight + aBorder.Top() + aBorder.Bottom()
+            ? aBorder.Top() + aBorder.Bottom()
             : aBorder.Left() + aBorder.Right());
         pSplitWindow->SetItemSizeRange(
             nSetId,

sd/source/ui/inc/PaneDockingWindow.hxx

@@ -69,11 +69,6 @@ public:
         Otherwise UnknownOrientation is returned.
     */
     Orientation GetOrientation (void) const;
-
-    /** The current height of the title bar.
-    */
-    sal_Int32 mnTitleBarHeight;
-
 };
 
 } // end of namespace ::sd