Disable auto-gossip in a raid instance

diff --git a/Monomyth.lua b/Monomyth.lua
index 2d65aee..4fc5826 100644
--- a/Monomyth.lua
+++ b/Monomyth.lua
@@ -72,7 +72,8 @@ Monomyth:Register('GOSSIP_SHOW', function()
 		end
 	end

-	if(available == 0 and active == 0 and GetNumGossipOptions() == 1) then
+	local _, instance = GetInstanceInfo()
+	if(available == 0 and active == 0 and GetNumGossipOptions() == 1 and instance == 'raid') then
 		local _, type = GetGossipOptions()
 		if(type == 'gossip') then
 			SelectGossipOption(1)