Fix the potential segfault

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@1330 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index c09d550..fe490c5 100755 (executable)
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -2572,8 +2572,10 @@ static struct ast_frame *zt_handle_event(struct ast_channel *ast)
                case ZT_EVENT_ALARM:
 #ifdef ZAPATA_PRI
 #ifdef PRI_DESTROYCALL
-                       if (p->call && p->pri->pri)
+                       if (p->call && p->pri && p->pri->pri)
                                pri_destroycall(p->pri->pri, p->call);
+                       else
+                               ast_log(LOG_WARNING, "The PRI Call have not been destroyed\n");
                        p->call = NULL;
 #else
 #error Please "cvs update" and recompile libpri