Removed sccp_indicate2str and skinny_callstate2str. Replaced sccp_channel_setSkinnyCallState with sccp_channel_setChannelState, which was actually meant/implied. replaced the sccp_indicate use of uint8_t state with sccp_channelstate_t state, which generated warnings of converted enum values showing the errornous mapping to skinny_callstate, where sccp_channelstate should have been used.

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5475 43c1dc8c-776e-4df2-8ef1-6e829299be21