Forage Wagon Hay Lock V0.1.0.5

PURPOSE Prevents hay already collected in a forage wagon from being overwritten by grass or by another hay type.
BEHAVIOUR – More of the SAME hay type collects normally. – Normal grass is ignored while hay is loaded. – Fresh Clover and fresh Alfalfa are ignored while hay is loaded when those fill types exist. – A DIFFERENT hay type is ignored while hay is loaded. – Empty wagons and wagons containing non-hay material retain normal game behaviour.
SUPPORTED HAY TYPES – Hay: DRYGRASS_WINDROW – Clover Hay: DRYCLOVER_WINDROW – Alfalfa Hay: DRYALFALFA_WINDROW
Fixes a problem that could allow the contents of a forage wagon to be overwritten by a different grass or hay type. Fixes and improvements
Fixed registration for standard and custom forage-wagon vehicle types. Grass already loaded can no longer be overwritten by Hay. Hay already loaded can no longer be overwritten by Grass. More of the same fill type can still be collected normally. Supported Clover and Alfalfa variants are also kept separate. Tested successfully using the 8450 Windrower forage wagon on the Kinlaig map.