Fixing refcount when sccp reload for changes in line cid_name / label

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4552 43c1dc8c-776e-4df2-8ef1-6e829299be21
Fix module line destroy

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4553 43c1dc8c-776e-4df2-8ef1-6e829299be21