grub-fs-tester: Fix bashism

diff --git a/tests/util/grub-fs-tester.in b/tests/util/grub-fs-tester.in
index fd7e0f1..15969d7 100644 (file)
--- a/tests/util/grub-fs-tester.in
+++ b/tests/util/grub-fs-tester.in
@@ -957,7 +957,7 @@ for LOGSECSIZE in $(range "$MINLOGSECSIZE" "$MAXLOGSECSIZE" 1); do
            esac
            # Make sure file is not exact multiple of block size. This helps to force
            # tail packing in case of squash4.
-           : $((BLOCKCNT--))
+           BLOCKCNT="$((BLOCKCNT-1))"
            case x"$fs" in
                x"ntfscomp")
                    setfattr -h -v 0x00000800 -n system.ntfs_attrib_be "$MNTPOINTRW/$OSDIR";;