RubyMoney / money / 1437

100%

master: 100%

Pull #841

travis-ci

Prevent Divide By Zero in allocate

This leads to an error when attempting to allocate a zero value, and the
zero value is the first argument in parts.

Example:

```
[1] pry(main)> Money.new(100, "USD").allocate([1, 1, 0])
=> [#<Money fractional:50 currency:USD>, #<Money fractional:50 currency:USD>, #<Money fractional:0 currency:USD>]

[2] pry(main)> Money.new(100, "USD").allocate([0, 1, 1])
ZeroDivisionError: divided by 0

[3] pry(main)> Money.new(100, "USD").allocate([1, 1, 0.0])
=> [#<Money fractional:50 currency:USD>, #<Money fractional:50 currency:USD>, #<Money fractional:0 currency:USD>]

[4] pry(main)> Money.new(100, "USD").allocate([0.0, 1, 1])
FloatDomainError: NaN
```

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