[1.7.0] Bone Grab free cast

[trungaczne]

This was observed twice on different occasions. When Bone Grab was used at melee range, it sometimes deals the damage without going on cooldown/costing vim. Doesn't take a turn either. I have killed a rare with this.

This isn't reliably reproducible - it works fine on most occasions. I have only cast it in melee range however (playing Corruptor) so it might have to do with the pushback interaction.

[darkgod]

fixed