Module Name:	src
Committed By:	hwr
Date:		Sun Apr 25 10:26:30 UTC 1999

Modified Files:
	src/sys/netinet: igmp.c
Log Message:
If the incoming code value is 0, timer gets 0, which would mean
a divide by zero afterwards.
This is also, what Bill Fenner seems to have done in the FreeBSD igmp
code.
This should fix kern/6541.