#63 storage cart into double chest causes exception

[Mughi]

When sending a storage cart into a double chest, the server displays the following error:

[SEVERE] Exception while calling plugin function in 'class MinecartMania$Listener' while calling hook: 'VEHICLE_UPDATE'.
java.lang.ClassCastException

Nothing seems to break, but when there are a lot of these, it makes a mess out of the server console

system information:system info: Heymod 133, MinecartMania 2.4 beta (also tested with 2.3b), Minecraft Beta 1.1_02

steps to reproduce: send a storage minecart into a double chest.
notes: ONLY happens with storage minecarts and double chests. Does NOT occur with other minecart types or single chests

[Mughi]

edit: NOT TESTED with 2.3b only 2.4beta (copy paste fail)