set hard-coded value to config or vanilla default value

[momo-i2]

Is there an existing feature request for this?

• I have searched the existing issues

Describe what you would like added or changed

Currently, Minecart explodes when 12 or more Minecarts are stacked, but since the trap that suffocates at the vanilla default value of 24 is no longer usable, please either make it so that it explodes when stacked more than the vanilla default value or allow the configuration file to set an optional value for the explosion.

railcraft/src/main/java/mods/railcraft/world/entity/vehicle/MinecartHandler.java

Line 87 in 57cca80

if (carts.size() >= 12) {