SvxTableController::setCursorLogicPosition: fix unexpected graphic selection

Without this, an editeng selection handle dragged to the next cell and
turning into an Impress table selection triggers a graphic selection,
too.

Change-Id: Idf5e28f9b8d1ee8dacc6f869a17157e080f2c478

svx/source/table/tablecontroller.cxx

@@ -3172,8 +3172,12 @@ bool SvxTableController::setCursorLogicPosition(const Point& rPosition, bool bPo
             return true;
         }
         else if (aCellPos != maMouseDownPos)
+        {
             // No selection, but rPosition is at an other cell: start table selection.
             StartSelection(maMouseDownPos);
+            // Update graphic selection, should be hidden now.
+            mpView->AdjustMarkHdl();
+        }
     }
 
     return false;