Bug 540369. Fix logic error which prevented hang detection in unit tests from working if autorun was specified. r=ted

testing/mochitest/runtests.py.in

@@ -461,7 +461,7 @@ class Mochitest(object):
     # then again to actually run mochitest
     if options.timeout:
       timeout = options.timeout + 30
-    elif options.autorun:
+    elif not options.autorun:
       timeout = None
     else:
       timeout = 330.0 # default JS harness timeout is 300 seconds