rwatson b7201f0455 Merge if.c:1.238 from HEAD to RELENG_6:
In multicast routines:

  Compare pointers with NULL rather than treating them as booleans.

  Compare pointers with NULL rather than 0 to make it more clear
  they are pointers.

  Assign pointers value of NULL rather than 0 to make it more clear
  they are pointers.

Approved by:	re (kensmith)
2005-08-18 18:36:53 +00:00
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