Replace calloc(3) with malloc(3), and set the tail of the

Replace calloc(3) with malloc(3), and set the tail of the
argument list to NULL, to terminate the arguments passed
to execvp(2).

Thanks to:	bde (for pointing out some missing parens)

And with apologies to Ozzy Osbourne:

	On his way to dinner
	It took him by surprise
	When an email from bde
	Said his code was full of lies

	Style (indentation)
	And his bracing were all wrong
	He casted to size_t
	When he should have cast to long

	I don't mind

	Single letter identifiers
	Unwrapped Line
	Over 80 chars
	Far over 80 chars

	Who can we get to send diffs
	We need Bruce D. Evans
	Shows you comparason to his
	We need Bruce D. Evans again