signal(3) bug +fix

[Steven M. Schultz]

Subject: signal(3) misdeclares mask array
Index:	lib/libc/gen/signal.c 2.10BSD

Description:
	The signal(3) routine has a long vs. int bug.  signal masks
	are 32 bits long rather than 16.

Repeat-By:
	Examination.  
	
	The thing which drew attention to this bug was that the generated 
	code showed a "sxt" being generated rather than a true double 
	word move.

Fix:
	Apply the following patch to /usr/src/lib/libc/gen/signal.c, recompile
	using the guidlines in the Makefile and insert in to the c libraries.
	Or, recompile the entire C library, but that seems a bit severe.

*** signal.c.old	Sun Mar  9 19:56:54 1986
--- signal.c	Sun Sep 10 20:51:09 1989
***************
*** 18,24 ****
  	int s, (*a)();
  {
  	struct sigvec osv, sv;
! 	static int mask[NSIG];
  	static int flags[NSIG];
  
  	sv.sv_handler = a;
--- 18,24 ----
  	int s, (*a)();
  {
  	struct sigvec osv, sv;
! 	static long mask[NSIG];
  	static int flags[NSIG];
  
  	sv.sv_handler = a;