Fix compile warning

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4602 43c1dc8c-776e-4df2-8ef1-6e829299be21
Fix ast_enable_distributed_devstate compile warning

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4603 43c1dc8c-776e-4df2-8ef1-6e829299be21