fix: msys: fixed false error in mtdburn sequence: 'file too big'

	when running mtdburn with missing file, it showed the
	error message 'file too big' which is incorrect.
	file size variable was defined as unsigned int,
	when assigning negative value (-1) it was interpreted
	as different value (FFF..).
	- change filesize variable type to int
	- Fixed JIRA:SYSTEMSW-1683

Change-Id: Id586c497169348cab1bff3130feeae4cc55ac8e5
Signed-off-by: Alaa Jarbony <alaaj@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/17967
Reviewed-by: Omri Itach <omrii@marvell.com>
Tested-by: Omri Itach <omrii@marvell.com>
1 file changed