Use a variable that makes slightly better sense.

Specifically, in code that looks like

	...compute i...
	vn = i;
	switch (...)
	 { ...
	   ...malloc(i)...
	   ...malloc(i*...)...
	   ...code that uses i as a temporary...

use vn rather than i in the malloc calls.  The value is the same, but
vn makes slightly better sense semantically.