make this operator= a little less crazy

if SetGraphicPos was called with GPOS_NONE then
xGraphicObject, maStrLink and maStrFilter are
in a suitable state to copy to get the same
results as explicitly forced here

Change-Id: Id072590e92e0c083a3cbc443db0e85d9dbfa73f0
Reviewed-on: https://gerrit.libreoffice.org/30780Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

editeng/source/items/frmitems.cxx

@@ -3672,29 +3672,15 @@ bool SvxBrushItem::GetPresentation
 SvxBrushItem& SvxBrushItem::operator=(const SvxBrushItem& rItem)
 {
     aColor = rItem.aColor;
-    eGraphicPos = rItem.eGraphicPos;
-
-    xGraphicObject.reset();
-    maStrLink.clear();
-    maStrFilter.clear();
-
-    if ( GPOS_NONE != eGraphicPos )
-    {
-        maStrLink = rItem.maStrLink;
-        maStrFilter = rItem.maStrFilter;
-        if (rItem.xGraphicObject)
-        {
-            xGraphicObject.reset(new GraphicObject(*rItem.xGraphicObject));
-        }
-    }
-
     nShadingValue = rItem.nShadingValue;
-
+    xGraphicObject.reset(rItem.xGraphicObject ? new GraphicObject(*rItem.xGraphicObject) : nullptr);
     nGraphicTransparency = rItem.nGraphicTransparency;
+    maStrLink = rItem.maStrLink;
+    maStrFilter = rItem.maStrFilter;
+    eGraphicPos = rItem.eGraphicPos;
     return *this;
 }
 
-
 bool SvxBrushItem::operator==( const SfxPoolItem& rAttr ) const
 {
     DBG_ASSERT( SfxPoolItem::operator==(rAttr), "unequal types" );