Wrong NBT TAG types for MinSpawnDelay, MaxSpawnDelay and Delay of spawner

Internally MinSpawnDelay, MaxSpawnDelay and Delay are stored as integers, however they are saved as short values to the NBT data.
(They can be found in the /Client/src/net/minecraft/tileentity/MobSpawnerBaseLogic.java class (MCP 1.8 names))

(This might not affect 1.8.9)