same as in other places, check that generator->release is not NULL

before calling it.
This allows generators to set it to NULL when they have nothing to
do there.

Later, the three copies of the code that releases a generator
should be moved to a function.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@48766 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/channel.c b/main/channel.c
index 75db6d28f37f726e2914175fe4961c7e693c74bf..3b06b266ad37ab6dc17b5a40873e691323036151 100644 (file)
--- a/main/channel.c
+++ b/main/channel.c
@@ -1572,7 +1572,8 @@ int ast_hangup(struct ast_channel *chan)
        }
        
        if (chan->generatordata)        /* Clear any tone stuff remaining */
-               chan->generator->release(chan, chan->generatordata);
+               if (chan->generator && chan->generator->release)
+                       chan->generator->release(chan, chan->generatordata);
        chan->generatordata = NULL;
        chan->generator = NULL;
        if (chan->cdr) {                /* End the CDR if it hasn't already */