Hide Silo Filltype 1.0.0.3

This script allows to hide filler types with zero quantity when unloading the silo into a trailer or other equipment. All filler types can still be stored in the silo, but only those with a quantity greater than 0 will be displayed during unloading. Works depending on the trailer or equipment used. There must be at least one type of filler in the silo for this feature to work.

Changes:
Fixed a bug in the script.

Credits:
[HIP]Marco