Remove bare doesn't give enough return arguments

[speedyhoon]

goreturns doesn't generate enough return parameters for the following snippet when using the -b flag to remove bare returns.
goreturns -b -w file.go

file.go:

package main

func temp() (a, b, c uint64, ok bool) {
	return
}

Output:

package main

func temp() (a, b, c uint64, ok bool) {
	return a, ok
}

Expected:

package main

func temp() (a, b, c uint64, ok bool) {
	return a, b, c, ok
}