Fix compile against asterisk-1.6 / asterisk-1.8

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4955 43c1dc8c-776e-4df2-8ef1-6e829299be21
fixes #150 (To Unkown Number in placed calls) and removes asterisk state in indicate

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4956 43c1dc8c-776e-4df2-8ef1-6e829299be21