Fix ticket #237: Guard against nil aura table.

git-svn-id: svn+ssh://svn.curseforge.net/wow/ovale/mainline/trunk@902 d5049fe3-3747-40f7-a4b5-f36d6801af5f
Sanity check that all functions called within the script are defined.

Create a new debugging toggle that reports undefined functions to the chat
window when a script is compiled.

git-svn-id: svn+ssh://svn.curseforge.net/wow/ovale/mainline/trunk@903 d5049fe3-3747-40f7-a4b5-f36d6801af5f
Minor optimization: release nodes in O(n) time, not O(n^2) time.

git-svn-id: svn+ssh://svn.curseforge.net/wow/ovale/mainline/trunk@904 d5049fe3-3747-40f7-a4b5-f36d6801af5f
Initialize a variable in a more clearly-documented way.

git-svn-id: svn+ssh://svn.curseforge.net/wow/ovale/mainline/trunk@905 d5049fe3-3747-40f7-a4b5-f36d6801af5f