Update broken AllowWeaponTargetCheck in gadgets.lua (beyond-all-reaso…

…n#3984)

Update gadgets.lua

luarules/gadgets.lua

@@ -1662,14 +1662,21 @@ function gadgetHandler:TerraformComplete(unitID, unitDefID, unitTeam,
 end
 
 function gadgetHandler:AllowWeaponTargetCheck(attackerID, attackerWeaponNum, attackerWeaponDefID)
-	for _, g in ipairs(self.AllowWeaponTargetCheckList) do
-		if not g:AllowWeaponTargetCheck(attackerID, attackerWeaponNum, attackerWeaponDefID) then
-			return false
+local ignore = true
+for _, g in ipairs(self.AllowWeaponTargetCheckList) do
+	local allowCheck, ignoreCheck = g:AllowWeaponTargetCheck(attackerID, attackerWeaponNum, attackerWeaponDefID)
+	if not ignoreCheck then
+		ignore = false
+		if not allowCheck then
+			return 0
 		end
 	end
-	return true
 end
 
+return ((ignore and -1) or 1)
+end
+
+
 function gadgetHandler:AllowWeaponTarget(attackerID, targetID, attackerWeaponNum, attackerWeaponDefID, defPriority)
 	local allowed = true
 	local priority = 1.0