Small bug in calls.c

[Kevin S. B. Szabo]

I have used calls(1) which was distributed some time ago,
and noticed a small bug. Calls does not recognize '_' as
a valid character in function names. This change should 
fix it.

diff calls.c calls.old
218c218
< 	for(i=0; isalpha(c) || isdigit(c) || (c == '_') ; i++){
---
> 	for(i=0; isalpha(c) || isdigit(c) ; i++){

Thanks to M.M.Taylor (DCIEM) & Alexis Kwan (HCR for DCIEM)
for sending out the source.....

-- 
	Kevin Szabo  watmath!wateng!ksbszabo (E.E. U of Waterloo)