fix assorted unused code and wrong format specs found by cppchekc (bug 6716)

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/e2fsprogs/old_e2fsprogs/ext2fs/initialize.c b/e2fsprogs/old_e2fsprogs/ext2fs/initialize.c
index da2d151..240335b 100644
--- a/e2fsprogs/old_e2fsprogs/ext2fs/initialize.c
+++ b/e2fsprogs/old_e2fsprogs/ext2fs/initialize.c
@@ -83,7 +83,7 @@
 	if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb))
 		rsv_gdb = EXT2_ADDR_PER_BLOCK(sb);
 #ifdef RES_GDT_DEBUG
-	printf("max_blocks %lu, rsv_groups = %lu, rsv_gdb = %lu\n",
+	printf("max_blocks %lu, rsv_groups = %lu, rsv_gdb = %u\n",
 	       max_blocks, rsv_groups, rsv_gdb);
 #endif