finish UnitInRaid("player") → IsInRaid() sweep

Four more sites: GetUnbuffedRoster + SendChatMessageWide in api.lua,
the loot menu's inRaid local, and the raid module's early-return
guard. Same intent, named helper.

modules/loot.lua

@@ -323,7 +323,7 @@ pfUI:RegisterModule("loot", function ()
   end
 
   function pfUI.loot:InitGroupDropDown()
-    local inRaid = UnitInRaid("player")
+    local inRaid = IsInRaid()
     if UIDROPDOWNMENU_MENU_LEVEL == 1 then
       if ( inRaid ) then
         pfUI.loot:BuildRaidMenu(UIDROPDOWNMENU_MENU_LEVEL)

modules/raid.lua

@@ -106,7 +106,7 @@ pfUI:RegisterModule("raid", function ()
     this.pendingUpdate = nil
 
     -- don't proceed without raid
-    if not UnitInRaid("player") then return end
+    if not IsInRaid() then return end
 
     -- clear all existing frames
     for i=1, maxraid do SetRaidIndex(pfUI.uf.raid[i], 0) end