make sure projects get scheduled on newly available slaves.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@1591 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/Slave.java

@@ -242,6 +242,8 @@ public final class Slave implements Node, Serializable {
                         });
 
                         logger.info("slave agent launched for "+slave.getNodeName());
+
+                        Hudson.getInstance().getQueue().scheduleMaintenance();
                     } catch (IOException e) {
                         Util.displayIOException(e,listener);