* alloc.c (gc_sweep): Don't read past end of array.

In theory, the old code could also have corrupted Emacs internals,
though it'd be very unlikely.

src/ChangeLog

+2011-07-13  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* alloc.c (gc_sweep): Don't read past end of array.
+	In theory, the old code could also have corrupted Emacs internals,
+	though it'd be very unlikely.
+
 2011-07-12  Andreas Schwab  <schwab@linux-m68k.org>
 
 	* character.c (Fcharacterp): Don't advertise optional ignored

src/alloc.c

@@ -5733,7 +5733,7 @@ gc_sweep (void)
 	int ilim = (lim + BITS_PER_INT - 1) / BITS_PER_INT;
 
 	/* Scan the mark bits an int at a time.  */
-	for (i = 0; i <= ilim; i++)
+	for (i = 0; i < ilim; i++)
 	  {
 	    if (cblk->gcmarkbits[i] == -1)
 	      {