tdf#120703 PVS: re-read aPrefSize after updating it

V581 The conditional expressions of the 'if' statements situated
     alongside each other are identical. Check lines: 645, 655

Since commit 37aa7d81aacaae12dfe0fd2ade2779235bbf72f1

Change-Id: I7b4d2d58e51cf98ac6294d1feacd28c3a8761d81
Reviewed-on: https://gerrit.libreoffice.org/71431
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
diff --git a/svx/source/sdr/primitive2d/sdrattributecreator.cxx b/svx/source/sdr/primitive2d/sdrattributecreator.cxx
index 806d403..fe657f5b 100644
--- a/svx/source/sdr/primitive2d/sdrattributecreator.cxx
+++ b/svx/source/sdr/primitive2d/sdrattributecreator.cxx
@@ -649,6 +649,7 @@
                {
                    aGraphic.SetPrefSize(aGraphic.GetBitmapEx().GetSizePixel());
                    aGraphic.SetPrefMapMode(MapMode(MapUnit::MapPixel));
                    aPrefSize = aGraphic.GetPrefSize();
                }
            }