in `worker.commitTransaction` should also revert the gas pool when err is not nil and the TX is not added to the state

[krasi-georgiev]

https://github.com/ethereum/go-ethereum/blob/master/miner/worker.go#L863-L875

for example in this code the when core.ApplyTransaction returns an error the pool will be reduced where in fact the tx is not added to the state.

[rjl493456442]

Thanks for catching it. I think it's a valid issue.
The gas allowance will be wasted by invalid transactions which will result in less transactions be included.