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Modify functions so that there is always a clear returned value.

Author Johnny C. Lam <jlam88@gmail.com>
Author date 2013-11-27 14:04:42
Author local date 2013-11-27 14:04:42 +0000
Committer Johnny C. Lam <jlam88@gmail.com>
Committer date 2013-11-27 14:04:42
Committer local date 2013-11-27 14:04:42 +0000
Commit 9bbc65ad75cd152693510a0cffdcfd37d890b5bc
Tree 80160e359c82111418b22a96944fa8616d5c54ed
Parent 67fd26a719563ebaca95d2d05e5c05ba9a8d5f17
Modify functions so that there is always a clear returned value.

This is a code-correctness issue -- don't silently return nil; instead,
make it explicit for better readability and code analysis opportunities.

git-svn-id: svn://svn.curseforge.net/wow/ovale/mainline/trunk@1226 d5049fe3-3747-40f7-a4b5-f36d6801af5f