Add missing unlock (although it shouldn't make a difference)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2922 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index 40215c7..4ede61f 100755 (executable)
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -1641,6 +1641,7 @@ static int zt_call(struct ast_channel *ast, char *rdest, int timeout)
                }
                if (pri_grab(p, p->pri)) {
                        ast_log(LOG_WARNING, "Failed to grab PRI!\n");
+                       ast_mutex_unlock(&p->lock);
                        return -1;
                }
                if (!(p->call = pri_new_call(p->pri->pri))) {