fix: storage value encoding in forked trie.

[nebojsa94]

This PR resolves #625

It extends the ethereumjs-util rlp encoding by forcing the removal of any leading zeros.

[nebojsa94]

Hey @davidmurdoch @seesemichaelj I took the liberty of implementing the fix myself, as it wasn't that big! Do let me know if any changes are needed.

[mikeseese]

Thanks for the PR!

I'll defer to @davidmurdoch on this one. @nebojsa94 any chance you could add a test that demonstrates it's broken before the fix and fixed after it?

[nebojsa94]

Done @seesemichaelj,

@davidmurdoch let me know if any other changes need to be made

[BogdanHabic]

Hey @davidmurdoch, I wanted to check if we could help out in any way to push this forward? 😄

[davidmurdoch]

@BogdanHabic Ah, sorry I dropped the ball on this! I'll review this today!

[lgrapenthin]

I just wanted to say that I ran into a similar issue (reading back contract after write in same call not correct), and this patch fixed it.
Please cut a new release, it will prevent many debugging headaches :)