Adding storage into the pointer for Voter delegate

[designium]

Hi,

The example from https://github.com/ethereum/solidity/blob/develop/docs/solidity-by-example.rst is not working.

It keeps giving this error in the Mist program:

 Could not compile source code. 

 Variable is declared as a storage pointer. Use an explicit "storage" keyword to silence this warning.
        Voter delegate = voters[to];
        ^------------^

The solution is just to add the keyword "storage" and then the example works again.

[chriseth]

Thanks!

[axic]

@designium note, it wasn't an error, but a warning, just Mist treats it as an error. Issue tracked here ethereum/mist#2797.

[designium]

Thanks!