ft2232_spi.c: Improve handling of static buffer

If `buf` became NULL because of an error, subsequent calls to the
`ft2232_spi_send_command` function with a smaller buffer size will
result in a null pointer dereference. Add an additional null check
before using `buf` to prevent that. Moreover, use `size_t` for the
`bufsize` and `oldbufsize` variables, as it's what `realloc` uses.

Change-Id: Idc4237ddca94c42ce2a930e6d00fd2d14e4f125c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/39975
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions