erofs-utils: fix error handler notes when parameter miss

If a parameter isnot input, mkfs's error handler cannot give
a correct notes, fix it.

Link: https://lore.kernel.org/r/20191011170953.6267-2-blucerlee@gmail.com
Signed-off-by: Li Guifu <blucerlee@gmail.com>
Signed-off-by: Gao Xiang <hsiangkao@aol.com>
1 file changed