Warning when parsing CSS

[GoogleCodeExporter]

The change 
https://code.google.com/p/gwt-dnd/source/diff?spec=svn25647ec77ebb836307ad758ee3
168eaf656f9eb1&r=25647ec77ebb836307ad758ee3168eaf656f9eb1&format=side&path=/Drag
Drop/src/com/allen_sauer/gwt/dnd/client/util/gwt-dnd.css introduced a warning 
when parsing the file gwt-dnd.css.

The \ in line 63 should not have been removed.

Original issue reported on code.google.com by tamalet@gmail.com on 17 Dec 2014 at 6:55

[gilberto-torrezan]

The full compiler output of the warning is:

Computing all possible rebind results for 'com.allen_sauer.gwt.dnd.client.util.DragClientBundle'
   Rebinding com.allen_sauer.gwt.dnd.client.util.DragClientBundle
      Invoking generator com.google.gwt.resources.rebind.context.InlineClientBundleGenerator
         Preparing method css
            The following problems were detected
               [WARN] Line 63 column 30: encountered "=". Was expecting one of: "+" "-" "," "/" ")" <STRING> <IDENT> <NUMBER> <URL> <PERCENTAGE> <PT> <MM> <CM> <PC> <IN> <PX> <EMS> <EXS> <DEG> <RAD> <GRAD> <MS> <SECOND> <HZ> <KHZ> <DIMEN> <HASH> <UNICODERANGE> <FUNCTION> 

[gilberto-torrezan]

Still having those warnings on v.3.3.4. Is there any special setup?