X3fParser, addProperties(): check buf size, don't catch exception.
X3fParser, addProperties(): check buf size, don't catch exception.

It looks like that getString() wants at least 2 bytes.
Rest will have to wait until a fuzzed crash appears.

LebedevRI/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed