handle fontname and other commands which respond with non-cstrings; r=mkaply, sr=smfr, a=asa; bug 204053

git-svn-id: svn://10.0.0.236/trunk@142817 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/content/html/document/src/nsHTMLDocument.cpp

@@ -4594,6 +4594,11 @@ nsHTMLDocument::QueryCommandValue(const nsAString & commandID,
   if (NS_SUCCEEDED(rv) && cStringResult && cStringResult[0]) {
     _retval.Assign(NS_ConvertUTF8toUCS2(cStringResult));
   }
+  else if (NS_FAILED(rv)) {
+    // get string value if it's not a c-string; might be a font name
+    rv = cmdParams->GetStringValue("state_attribute", _retval);
+  }
+
   if (cStringResult) {
     nsMemory::Free(cStringResult);
   }