Destroy results from previous sccp_config_parse_deny_permit, before running again (Reported by Sander Smeenk). This funktion still needs a comparison to report back change, which is not so simple to add.

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5315 43c1dc8c-776e-4df2-8ef1-6e829299be21