gdbstub: fix off-by-one in gdb_handle_packet()

memtohex() adds an extra trailing NUL character.

Reported-by: AddressSanitizer
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20180408145933.1149-1-f4bug@amsat.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit 9005774b27b6aa5e1c99d80bd59d5d048c2f7077)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
1 file changed