# This is a combination of 3 commits.
# The first commit's message is:
Fixed the problem where parseSkip and parseLimit don't cover the case were req.options.limit/skip returns `null` instead of `undefined`

# This is the 2nd commit message:

Let's just check for isNaN as last case check instead

# This is the 3rd commit message:

Let's try to check with zero as suggested
Fixed the problem where parseSkip and parseLimit don't cover the case were req.options.limit/skip returns `null` instead of `undefined`

Fixed the problem where parseSkip and parseLimit don't cover the case were req.options.limit/skip returns `null` instead of `undefined`

Let's just check for isNaN as last case check instead

Let's try to check with zero as suggested

Correct code for parseSkip()