[PATCH][PPC32] mktree fix

[Andre' Draszik]

This one fixes mktree. The image size stored in the header is pretty off without
this patch. (yes, it can make a difference of upto almost 64k)

Signed-off-by: Andre' Draszik <andid at gmx.net>

diff -urN linuxppc-2.5.orig/arch/ppc/boot/utils/mktree.c 
linuxppc-2.5/arch/ppc/boot/utils/mktree.c
--- linuxppc-2.5.orig/arch/ppc/boot/utils/mktree.c      2005-02-03 
20:20:39.000000000 +0100
+++ linuxppc-2.5/arch/ppc/boot/utils/mktree.c   2005-02-06 03:13:27.000000000 
+0100
@@ -113,7 +113,8 @@
                exit(4);
        }

-       nblks -= (64 * 1024) / IMGBLK;
+       nblks -= (64 * 1024 - sizeof (bt)) / IMGBLK;
+       bt.bb_num_512blocks = htonl(nblks + 1);

        /* And away we go......
        */
@@ -122,7 +123,7 @@
                exit(5);
        }

-       while (nblks-- > 0) {
+       while (--nblks > 0) {
                if (read(in_fd, tmpbuf, IMGBLK) < 0) {
                        perror("zImage read");
                        exit(5);