fix picture jumping to incorrect X position after dragging

If a picture anchored to character is dragged vertically, it can actually
jump to the left, even though X should stay the same. This change
basically reverts part of 5ddd93f4.
I haven't figured out how this GetBaseOfstForFly() actually works, but
I'm reasonably sure that the relative X offset introduced by it
in SwFlyAtCntFrm::SetAbsPos() is not undone anywhere in SwFlyFrm::ChgRelPos()
or otherwise acted upon, it simply causes relative X position change, even though
the absolute position remained the same.

Change-Id: Iabf4f4e4268711a36f02aa47ca9624f9007a22a6

sw/source/core/layout/flycnt.cxx

@@ -1295,39 +1295,29 @@ void SwFlyAtCntFrm::SetAbsPos( const Point &rNew )
     }
 
     SwFlyFrmFmt *pFmt = (SwFlyFrmFmt*)GetFmt();
-    const SwFmtSurround& rSurround = pFmt->GetSurround();
-    const bool bWrapThrough =
-        rSurround.GetSurround() == SURROUND_THROUGHT;
-    SwTwips nBaseOfstForFly = 0;
-    const SwFrm* pTmpFrm = pFrm ? pFrm : pCnt;
-    if ( pTmpFrm->IsTxtFrm() )
-        nBaseOfstForFly =
-            ((SwTxtFrm*)pTmpFrm)->GetBaseOfstForFly( !bWrapThrough );
 
     if( bVert )
     {
         if( !pFrm )
-            nX += rNew.Y() - pCnt->Frm().Top() - nBaseOfstForFly;
+            nX += rNew.Y() - pCnt->Frm().Top();
         else
-            nX = rNew.Y() - pFrm->Frm().Top() - nBaseOfstForFly;
+            nX = rNew.Y() - pFrm->Frm().Top();
     }
     else
     {
         if( !pFrm )
         {
             if ( pCnt->IsRightToLeft() )
-                nX += pCnt->Frm().Right() - rNew.X() - Frm().Width() +
-                      nBaseOfstForFly;
+                nX += pCnt->Frm().Right() - rNew.X() - Frm().Width();
             else
-                nX += rNew.X() - pCnt->Frm().Left() - nBaseOfstForFly;
+                nX += rNew.X() - pCnt->Frm().Left();
         }
         else
         {
             if ( pFrm->IsRightToLeft() )
-                nX += pFrm->Frm().Right() - rNew.X() - Frm().Width() +
-                      nBaseOfstForFly;
+                nX += pFrm->Frm().Right() - rNew.X() - Frm().Width();
             else
-                nX = rNew.X() - pFrm->Frm().Left() - nBaseOfstForFly;
+                nX = rNew.X() - pFrm->Frm().Left();
         }
     }
     GetFmt()->GetDoc()->GetIDocumentUndoRedo().StartUndo( UNDO_START, NULL );