coverity#983356 ressource leak

Change-Id: Idcc2d548363ddab04dd8acaa1dfb854a19ca47ef
Reviewed-on: https://gerrit.libreoffice.org/2200Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>

writerperfect/source/filter/OdgGenerator.cxx

@@ -1325,7 +1325,13 @@ void OdgGeneratorPrivate::_writeGraphicsStyle()
                 mGraphicsGradientStyles.push_back(new TagCloseElement("draw:opacity"));
             }
         }
-
+        else
+        {
+            /* if mxGradient.count() == 1 for some reason we would leak
+             * pDrawGradientElement
+             */
+            delete pDrawGradientElement;
+        }
         if(!bUseOpacityGradient)
             delete pDrawOpacityElement;
     }