make show-changed show better

scripts/keyreturn

@@ -11,6 +11,7 @@ import sys
 def main():
    infile = sys.stdin
    obj = json.load(infile)
+   ret = 0
    for name in sys.argv[1:]:
        if type(obj) != dict:
            print >> sys.stderr, "No dict found"
@@ -19,7 +20,9 @@ def main():
            print '%s: %s' % (name, obj.get(name, None))
        else:
            print >> sys.stderr, "No key %s found" % name
-      
+           ret = 1
+   return ret      
+   
 if __name__ == '__main__':
-    main()
+    sys.exit(main())