2008-01-07 Robert Millan <rmh@aybabtu.com>

* boot/i386/pc/boot.S (boot_drive_check): Add a comment indicating
        which instruction is modified by grub-setup during installation
        (since it wasn't obvious by only looking at this file).

boot/i386/pc/boot.S

@@ -114,7 +114,7 @@ after_BPB:
          * this does nothing (only jump).
          */
 boot_drive_check:
-        jmp     1f
+        jmp     1f	/* grub-setup may overwrite this jump */
         testb   $0x80, %dl
         jnz     1f
         movb    $0x80, %dl