Make the causes array static, and remove the type name as it is not needed.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@175983 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/channel.c

@@ -131,7 +131,7 @@ static AST_RWLIST_HEAD_STATIC(channels, ast_channel);
  *
  * \ref causes.h
 */
-const struct ast_cause {
+static const struct {
 	int cause;
 	const char *name;
 	const char *desc;