uncompress_buf is used each time uncompress is called, so
make sure it is initialized correctly so that we do not
call free() on an already free pointer.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
uncompress() has the same prototype as the various kernel decompress
functions. It automatically detects the compression type and selects
the correct uncompress function.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>