valgrind: Clear more unfreed memory issues

Command line used for checking:

  $ valgrind -v --leak-check=full ./sigrok-cli \
    -i rockband_wireless_keyboard_wii/midi_key4.sr \
    -P uart:baudrate=31250,midi -P uart:baudrate=31250,midi

Signed-off-by: Karl Palsson <karlp@etactica.com>
1 file changed