Client can always use carrot on a stick, ignoring pig's food state

The bug

The client can always use the carrot on a stick even if the pig cannot eat more from the carrot. The condition for the client to use a carrot on a stick is that the durability after the use has to be >= 0. However the server only allows the use of a carrot on a stick if the pig can eat again.

How to reproduce

1. Take a carrot on a stick and ride a pig
2. Hold right-click
3. Open your inventory and move the carrot on a stick

The damage should update and show the correct value