Lua access to puncture flag status (scp-fs2open#7323)

* lua access to puncture flag status

* disallow setting flag

* and don't grab the value even

* fix

Author: MjnMixael

code/scripting/api/objs/weaponclass.cpp

@@ -650,6 +650,28 @@ ADE_VIRTVAR(Bomb, l_Weaponclass, "boolean", "Is weapon class flagged as bomb", "
 		return ADE_RETURN_FALSE;
 }
 
+ADE_VIRTVAR(Puncture, l_Weaponclass, "boolean", "Is weapon class flagged as puncture", "boolean", "New flag")
+{
+	int idx;
+	if(!ade_get_args(L, "o", l_Weaponclass.Get(&idx)))
+		return ADE_RETURN_FALSE;
+
+	if(idx < 0 || idx >= weapon_info_size())
+		return ADE_RETURN_FALSE;
+
+	weapon_info *info = &Weapon_info[idx];
+
+	if(ADE_SETTING_VAR)
+	{
+		LuaError(L, "Setting Puncture flag is not supported");
+	}
+
+	if (info->wi_flags[Weapon::Info_Flags::Puncture])
+		return ADE_RETURN_TRUE;
+	else
+		return ADE_RETURN_FALSE;
+}
+
 ADE_VIRTVAR(CustomData, l_Weaponclass, nullptr, "Gets the custom data table for this weapon class", "table", "The weapon class's custom data table") 
 {
 	int idx;