func: static void register_exten(struct skinny_line *l) char multi [ 256 ] ; char * stringp , * ext , * context ; if ( ast_strlen_zero ( regcontext ) )  stringp = multi; while ( ext = strsep ( & stringp , "&" ) )  if ( context = strchr ( ext , '@' ) )  * context ++ = '\0'; if ( ! ast_context_find ( context ) )  ast_log ( LOG_WARNING , "Context %s must exist in regcontext= in skinny.conf!\n" , context ); ast_add_extension ( context , 1 , ext , 1 , NULL , NULL , "Noop" , ast_strdup ( l -> name ) , ast_free_ptr , "Skinny" ); 