Make sure C_PetBattles exists before checking IsInBattle()

diff --git a/TomTom_CrazyArrow.lua b/TomTom_CrazyArrow.lua
index 7d558e0..5434dc1 100755
--- a/TomTom_CrazyArrow.lua
+++ b/TomTom_CrazyArrow.lua
@@ -241,7 +241,7 @@ end

 function TomTom:ShowHideCrazyArrow()
 	if self.profile.arrow.enable then
-		if self.profile.arrow.hideDuringPetBattles and C_PetBattles.IsInBattle() then
+		if self.profile.arrow.hideDuringPetBattles and C_PetBattles and C_PetBattles.IsInBattle() then
 			wayframe:Hide()
 			return
 		end