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Changed the metatable for normalStats and friends to support adding and give 0 for nil values

Author Kevin Lyles <kevinlyles@gmail.com>
Author date 2009-12-16 08:29:23
Author local date 2009-12-16 02:29:23 -0600
Committer Kevin Lyles <kevinlyles@gmail.com>
Committer date 2009-12-17 08:03:51
Committer local date 2009-12-17 02:03:51 -0600
Commit 9a6ddae19e7834b864b205dad246497873302e66
Tree e3d75e776c9c441484f918e56700254e8fb14446
Parent caab80fc80f0be2ee410d7427e23f0e578e8d728
Changed the metatable for normalStats and friends to support adding and give 0 for nil values