res_hep: Release allocation reference to configuration.

ASTERISK-24362 #close
Reported by: Corey Farrell
Review: https://reviewboard.asterisk.org/r/4026/
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Merged revisions 424312 from http://svn.asterisk.org/svn/asterisk/branches/12
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Merged revisions 424313 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@424314 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_hep.c

@@ -560,6 +560,7 @@ static void hepv3_config_post_apply(void)
 	}
 
 	ao2_global_obj_replace_unref(global_data, data);
+	ao2_ref(data, -1);
 }
 
 /*!