Added to_i method

Hey guys, ran in to the problem like this in my tests when i tried to compare integer values and conversion values:

    NoMethodError: undefined method `to' for 41199:Fixnum
    ./spec/data/walk_data_spec.rb:21:in `block (3 levels) in <top (required)>'

    NoMethodError: undefined method `to' for 25600:Fixnum
    ./spec/data/walk_data_spec.rb:25:in `block (3 levels) in <top (required)>'

    NoMethodError: undefined method `to' for 7:Fixnum
    ./spec/data/walk_data_spec.rb:29:in `block (3 levels) in <top (required)>'


My test code looks like this:

    subject.distance.should == 41199
    
    subject.distance.should == 25600

    subject.distance.should == 7

My code in conversion code looks like this

    def distance
    case distance_units.to_s
      when "km"
        distance_result = @distance.km.to.meters
      when "m"
        distance_result = @distance
      when "feet"
        distance_result = @distance.feet.to.meters
      when "miles"
        distance_result = @distance.miles.to.meters
      else
        distance_result = @distance
    end
    # Distance always needs to return metric units
    distance_result.to_i
   end

@distance is float

I guess this is happening because Alchemist converts values to different class and it is not the same as a fixnum class, so it complains.

Added to_i method and alchemist tests are passing. My apps tests are passing as well

System used:

Ubuntu 12.10 x64
gem 'rails', '3.2.12'
gem 'rspec', '~> 2.12.0'
gem 'rspec-rails', '~> 2.12.0'

Is this okay?