constify ast_state2str() and note it is not reentrant.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@48477 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 4 insertions, 2 deletions

diff --git a/main/channel.c b/main/channel.c
index ac59eb352..07d099c6a 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -516,8 +516,10 @@ int ast_str2cause(const char *name)
 	return -1;
 }
 
-/*! \brief Gives the string form of a given channel state */
-char *ast_state2str(enum ast_channel_state state)
+/*! \brief Gives the string form of a given channel state.
+	\note This function is not reentrant.
+ */
+const char *ast_state2str(enum ast_channel_state state)
 {
 	char *buf;