Mail: correctly track the number of messages (thanks igor)

We forgot to update the message count when deleting
messages in mail, meaning we could access trailing
messages that had been freed.

diff --git a/sys/src/cmd/upas/Mail/mbox.c b/sys/src/cmd/upas/Mail/mbox.c
index 6d486456b9acf092c5cb97e20fd11c91e50a438f..97742e3792b3344f41a25f4d478d297f91e81ff8 100644 (file)
--- a/sys/src/cmd/upas/Mail/mbox.c
+++ b/sys/src/cmd/upas/Mail/mbox.c
@@ -715,6 +715,7 @@ mbflush(char **, int)
                else
                        mbox.mesg[j++] = m;
        }
+       mbox.nmesg = j;
                
        close(fd);
        fprint(mbox.ctl, "clean\n");