blizzard: Handle old arena frames still (#860)

Fixes #859

Author: p3lim

.luacheckrc

@@ -20,6 +20,7 @@ read_globals = {
 	table = {fields = {'removemulti', 'wipe'}},
 
 	-- FrameXML
+	'ArenaEnemyMatchFramesContainer',
 	'BossTargetFrameContainer',
 	'Clamp',
 	'ColorMixin',

blizzard.lua

@@ -159,6 +159,13 @@ function oUF:DisableBlizzard(unit)
 			for _, frame in next, CompactArenaFrame.memberUnitFrames do
 				handleFrame(frame, true)
 			end
+
+			-- old arena frames, they're still used for flag carriers etc in battlegrounds
+			handleFrame(ArenaEnemyMatchFramesContainer)
+
+			for _, frame in next, ArenaEnemyMatchFramesContainer.UnitFrames do
+				handleFrame(frame, true)
+			end
 		end
 	elseif(unit:match('nameplate%d?%d?%d?$')) then
 		local frame = C_NamePlate.GetNamePlateForUnit(unit)