[ospfd] Fix missing check for ospf_lookup NULL return, CID #70

[ospfd] Fix missing check for ospf_lookup NULL return, CID #70

2006-05-11 Paul Jakma <paul.jakma@sun.com>

	* ospf_vty.c: (general) Audit ospf_lookup calls in commands,
	  ensure check for NULL result, make vty messages consistent.
	  (show_ip_ospf_interface) Missing NULL check on ospf_lookup
	  result, fixes Coverity CID #70.