If distributed build isn't enabled, slave selection drop-down shouldn't be...

If distributed build isn't enabled, slave selection drop-down shouldn't be displayed in the job config.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@18027 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/resources/hudson/model/AbstractItem/configure-common.jelly

@@ -43,7 +43,7 @@ THE SOFTWARE.
   </j:if>
 
   <!-- master/slave -->
-  <j:if test="${!empty(app.slaves) || it.assignedLabel!=null}">
+  <j:if test="${!empty(app.slaves) || (it.assignedLabel!=null and it.assignedLabel!=app.selfLabel)}">
     <f:optionalBlock name="hasSlaveAffinity" title="${%Tie this project to a node}" checked="${it.assignedLabel!=null}"
         help="/help/project-config/slave.html">
       <f:entry title="${%Node}">