[MC-52852] setting negative variable in the /particle effect crashes the game

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here

What actually happened was...:
Describe what happened here

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...

Comments 4

incomplete

What did I think would happen?
Not sure, present the particle effect in a different way. .. or atleast generate an error saying it was impossible.

What actually happened?
The server crashed.

How to trigger the bug?
Put -1 in the speed field of the particle command

Cannot reproduce in 14w11b or 14w18a

ya this was fixed at some point already. Can be closed.