fix mountpoint test to not prevemt mkfs_xxx from making image in any file

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

testsuite/mount.tests

@@ -1,5 +1,4 @@
 #!/bin/sh
-
 # Copyright 2007 by Denys Vlasenko <vda.linux@googlemail.com>
 # Licensed under GPL v2, see file LICENSE for details.
 
@@ -10,8 +9,8 @@ test "`id -u`" = 0 || {
 	exit 0
 }
 
-dd if=/dev/zero of=mount.image1m count=1 bs=1M 2>/dev/null || exit 1
-mkfs.minix -v mount.image1m >/dev/null 2>&1 || exit 1
+dd if=/dev/zero of=mount.image1m count=1 bs=1M 2>/dev/null || { echo "dd error"; exit 1; }
+mkfs.minix -v mount.image1m >/dev/null 2>&1 || { echo "mkfs.minix error"; exit 1; }
 testdir=$PWD/testdir
 mkdir $testdir 2>/dev/null
 umount -d $testdir 2>/dev/null