Remove unneeded length modifier from suppressed match in sscanf() format in tests/crasher.c

GCC is complaining about the `%*jx' match in sscanf() format string.
Replace it with `%*x'; sscanf() will identically match an unsigned
hexadecimal integer without the length modifier.

crasher.c: In function 'write_maps':
crasher.c:30:9: warning: use of assignment suppression and length modifier together in gnu_scanf format [-Wformat]
1 file changed