suppress warnings when building with DEBUG_CHANNEL_LOCKS (issue #7330, casper)

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@33550 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 2 insertions, 0 deletions

diff --git a/include/asterisk/lock.h b/include/asterisk/lock.h
index 904a7e64e..db85c497b 100644
--- a/include/asterisk/lock.h
+++ b/include/asterisk/lock.h
@@ -782,6 +782,8 @@ AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p),
 #define ast_channel_trylock(x)		ast_mutex_trylock(&x->lock)
 #else
 
+struct ast_channel;
+
 /*! \brief Lock AST channel (and print debugging output)
 \note You need to enable DEBUG_CHANNEL_LOCKS for this function */
 int ast_channel_lock(struct ast_channel *chan);