Compiler warning "clear.gif"

Hi,

since we're using GWT 2.7 and GXT 3.1.2 we get a compiler warning.

Code:

[INFO] [INFO] Compiling module at.gevas.lagis.s.web.main
[INFO] [INFO]    Computing all possible rebind results for 'com.sencha.gxt.theme.blue.client.window.BlueWindowAppearance.BlueWindowDivFrameResources'
[INFO] [INFO]       Rebinding com.sencha.gxt.theme.blue.client.window.BlueWindowAppearance.BlueWindowDivFrameResources
[INFO] [INFO]          Invoking generator com.google.gwt.resources.rebind.context.InlineClientBundleGenerator
[INFO] [INFO]             Preparing method background
[INFO] [INFO]                [WARN] Resource 'com/sencha/gxt/core/public/clear.gif' was located via ClassLoader. As a result changes in that resource will not be reflected in per-file recompiles. It should be registered via  <source /> or <resource /> entry in your .gwt.xml. In a future version of GWT, we will remove this fallback and your application will stop compiling
[INFO] [INFO]       Rebinding com.sencha.gxt.theme.blue.client.window.BlueWindowAppearance.BlueWindowDivFrameResources

Our gwt.xml. file looks like this.

Code:

<module rename-to='index'>
       <inherits name="com.google.gwt.user.User" />
 
       <inherits name="com.sencha.gxt.ui.GXT" />
       <!-- Logging -->
       <inherits name="com.google.gwt.logging.LoggingDisabled" />
       <set-property name="gwt.logging.enabled" value="TRUE" />
       <set-property name="gwt.logging.logLevel" value="INFO" />
 
       <!-- GXT stylesheet -->
       <stylesheet src="reset.css" /> <!-- <<<< Sets up the GXT default stylesheet -->
 
       <!-- Set locale - all gui elements of gwt/gxt will be translated -->
       <extend-property name="locale" values="de" />
 
       <entry-point class="at.gevas.lagis.s.web.client.Main" />
 
       <!-- Super Dev mode -->
       <add-linker name="xsiframe"/>  
       <set-configuration-property name="devModeRedirectEnabled"
             value="true" />
       <set-property name="compiler.useSourceMaps" value="true" />
       <collapse-all-properties/>
 
       <!-- Sub-Directories which will be converted into javascript -->
       <source path="client" />
       <source path="share" />
 
</module>

How do we can solve this issue? Any hints are welcome.

Thank you

Sven

Compiler warning "clear.gif"