Resolves: #i120768# slide content merged Master viewer content

* subversion/main/sd/source/filter/eppt/epptso.cxx

[]should drop the redundant presentation placeholder textbox when import to ppt

Patch by: Ma Bingbing <jiazema@gmail.com>
Suggested by: Wang Zhe <kingwisemmx@gmail.com>
Found by: Yan Ji <yanji.yj@gmail.com>
Review by: Wang Zhe <kingwisemmx@gmail.com>

(cherry picked from commit 691aff9c)

Change-Id: I1a1de0152feaacb449f2e2bad444d1bff9e7c4cb

sd/source/filter/eppt/epptso.cxx

@@ -3063,6 +3063,13 @@ void PPTWriter::ImplWritePage( const PHLayout& rLayout, EscherSolverContainer& a
                 }
                 if ( !mbPresObj )
                 {
+                    if (ePageType == MASTER )
+                    {
+                        SdrObject* pObj = GetSdrObjectFromXShape( mXShape );
+                        if (pObj && pObj->IsNotVisibleAsMaster())
+                            continue;
+                    }
+
                     mType = "drawing.Text";
                     ImplCreateTextShape( aPropOpt, aSolverContainer, sal_True );
                 }