fix

git-svn-id: http://svn.net-core.org/repos/t-engine4@3368 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/data/talents/misc/inscriptions.lua

@@ -441,7 +441,7 @@ newInscription{
 	tactical = { BUFF = 4 },
 	on_pre_use = function(self, t)
 		local ok, data = pcall(self.getInscriptionData, self, t.short_name)
-		return ok and data.nb_uses > 0
+		return ok and data and data.nb_uses and data.nb_uses > 0
 	end,
 	action = function(self, t)
 		local data = self:getInscriptionData(t.short_name)