Moved WoW version constants into constants.lua, as it loads before utility. Also, they're constants :p

Author: Antonio Lobato

core/Constants.lua

@@ -22,6 +22,12 @@ along with AdiBags.  If not, see <http://www.gnu.org/licenses/>.
 local addonName, addon = ...
 local L = addon.L
 
+-- Constants for detecting WoW version.
+addon.isRetail = WOW_PROJECT_ID == WOW_PROJECT_MAINLINE
+addon.isClassic = WOW_PROJECT_ID == WOW_PROJECT_CLASSIC
+addon.isBCC = WOW_PROJECT_ID == WOW_PROJECT_BURNING_CRUSADE_CLASSIC and LE_EXPANSION_LEVEL_CURRENT == LE_EXPANSION_BURNING_CRUSADE
+addon.isWOTLK = WOW_PROJECT_ID == WOW_PROJECT_BURNING_CRUSADE_CLASSIC and LE_EXPANSION_LEVEL_CURRENT == LE_EXPANSION_NORTHREND
+
 --<GLOBALS
 local _G = _G
 local BACKPACK_CONTAINER = _G.BACKPACK_CONTAINER

core/Utility.lua

@@ -51,11 +51,6 @@ local type = _G.type
 local FAMILY_TAGS = addon.FAMILY_TAGS
 local FAMILY_ICONS = addon.FAMILY_ICONS
 
-addon.isRetail = WOW_PROJECT_ID == WOW_PROJECT_MAINLINE
-addon.isClassic = WOW_PROJECT_ID == WOW_PROJECT_CLASSIC
-addon.isBCC = WOW_PROJECT_ID == WOW_PROJECT_BURNING_CRUSADE_CLASSIC and LE_EXPANSION_LEVEL_CURRENT == LE_EXPANSION_BURNING_CRUSADE
-addon.isWOTLK = WOW_PROJECT_ID == WOW_PROJECT_BURNING_CRUSADE_CLASSIC and LE_EXPANSION_LEVEL_CURRENT == LE_EXPANSION_NORTHREND
-
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 -- (bag,slot) <=> slotId conversion
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