Remove unused pthread conditional from sccp_channel_t. Causes unaligned access issues on sparc64.

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4797 43c1dc8c-776e-4df2-8ef1-6e829299be21
Reducing size of sccp_group_t on systems which do not cope well with misaligned access (sparc64 for example). Having an unsigned long long inside sccp_channel_t causes havoc on these. Size reduction is only applied on systems that do not like misalinged memory accesses.

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4798 43c1dc8c-776e-4df2-8ef1-6e829299be21
Redefinition of ULONG from 'long long unsigned int' to the more readable 'unsigned long long' variety

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4799 43c1dc8c-776e-4df2-8ef1-6e829299be21