Step implementation parameter count should be validated.

[sriv]

Expected Behaviour

If there is a step implementation such as this:

step 'The word <word> has <count> vowels.' do |word,sdf, expectedCount|
  assert_equal(expectedCount.to_i, count_vowels(word))
end

Then gauge run specs should skip the scenarios using this step.

Actual Behaviour

Gauge continues to execute the steps.

Gauge version

Gauge version: 0.9.1

Plugins
-------
csharp (0.10.1)
html-report (4.0.1)
java (0.6.5)
js (2.0.0)
ruby (0.4.1)
xml-report (0.2.0)