ext2simg: use bool where appropriate

For the values that get used as the 'bool' parameters of
sparse_file_write(), use 'bool' in ext2simg too.  No change in behavior.

Change-Id: I05f7d6fd3027eb10231c035f9fdc8e946e2c4c90
Signed-off-by: Eric Biggers <ebiggers@google.com>
1 file changed