exynos5: libgscaler: modify set_format function.

Fixed the problem "stillshot always captures same image".
need to set_format always if someone request.

Change-Id: I2b1bb6bc83d62e8e3e5c3cbdb54e55f7ad2ed624
Signed-off-by: Sanghee Kim <haya93@samsung.com>
1 file changed