this assert is wrong

In calc it seems that shapes can have no autostyle.
e.g. exporting fdo60469-74405.xlsx to ods

Change-Id: Ie0b2888094ba40a89748a070ca2d14f4078da619

xmloff/source/text/txtparae.cxx

@@ -794,7 +794,7 @@ OUString XMLTextParagraphExport::FindTextStyleAndHyperlink(
         }
         OUString sParent; // AutoStyles should not have parents!
         sName = GetAutoStylePool().Find( XML_STYLE_FAMILY_TEXT_TEXT, sParent, xPropStates );
-        assert(!sName.isEmpty()); // AutoStyle could not be found
+        // assert(!sName.isEmpty()); // AutoStyle could not be found
         rbHasAutoStyle = sal_True;
     }