supervisorctl module: fixing typo in error handling

library/web_infrastructure/supervisorctl

@@ -113,7 +113,7 @@ def main():
         if os.path.exists(supervisorctl_path) and module.is_executable(supervisorctl_path):
             supervisorctl_args = [ supervisorctl_path ]
         else:
-            module.fail_json(msg="Provided path to supervisorctl does not exist or isn't executable: %s" % ctl_path)
+            module.fail_json(msg="Provided path to supervisorctl does not exist or isn't executable: %s" % supervisorctl_path)
     else:
         supervisorctl_args = [ module.get_bin_path('supervisorctl', True) ]