fix div by zero (bug #3467)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/v1-0@4976 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 16c911d6a9285f433749c7e2886a68f312ec9c93..f76a471ec81c95d22ee0593f97a20c1701c46798 100755 (executable)
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -2893,10 +2893,13 @@ static unsigned int calc_timestamp(struct chan_iax2_pvt *p, unsigned int ts, str
                                * next multiple of frame size (so our
                                * silent periods are multiples of
                                * frame size too) */
-                               int diff = ms % (f->samples / 8);
-                               if(diff)
-                                   ms += f->samples/8 - diff;
-
+                               int adj = f->samples / 8;
+                               if (adj) {
+                                       int diff = ms % adj;
+                                       if(diff)
+                                               ms += adj - diff;
+                               }
+                               
                                p->nextpred = ms;
                                p->notsilenttx = 1;
                        }