bug fix

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@17093 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/slaves/Channels.java

@@ -119,9 +119,9 @@ public class Channels {
 
         ArgumentListBuilder args = new ArgumentListBuilder();
         args.add(new File(System.getProperty("java.home"),"bin/java"));
-        args.add("-jar").add(Which.jarFile(Channel.class));
         if(systemProperties!=null)
             args.addKeyValuePairs("-D",systemProperties);
+        args.add("-jar").add(Which.jarFile(Channel.class));
 
         // build up a classpath
         if(classpath!=null)