Fixed getting state of 'noshade' attribute in Horizontal Lind Dialog. b=142784, r=brade, sr=hewitt

editor/ui/dialogs/content/EdHLineProps.js

@@ -103,7 +103,7 @@ function InitDialog()
     gDialog.alignGroup.selectedItem = gDialog.leftAlign;
   }
 
-  gDialog.shading.checked = globalElement.hasAttribute("noshade");
+  gDialog.shading.checked = !globalElement.hasAttribute("noshade");
 }
 
 function onSaveDefault()