ssize_t-problem-warning-example

`lib/ubsan/ubsan.cpp: In member function ‘small_string<36> val::to_string() const’:
lib/ubsan/ubsan.cpp:103:36: warning: format ‘%zd’ expects argument of type ‘signed size_t’, but argument 4 has type ‘ssize_t’ {aka ‘long int’} [-Wformat=]
  103 |             snprintf(s.buf, 36, "%zd", (ssize_t) val_);
      |                                  ~~^   ~~~~~~~~~~~~~~
      |                                    |   |
      |                                    int ssize_t {aka long int}
      |                                  %ld
lib/ubsan/ubsan.cpp: In function ‘void ubsan_handle_shift_out_of_bounds(const ubsan_shift_oob_data*, ssize_t, ssize_t)’:
lib/ubsan/ubsan.cpp:396:34: warning: format ‘%zd’ expects argument of type ‘signed size_t’, but argument 2 has type ‘ssize_t’ {aka ‘long int’} [-Wformat=]
  396 |         printf("shift exponent %zd is negative\n", rhs);
      |                                ~~^                 ~~~
      |                                  |                 |
      |                                  int               ssize_t {aka long int}
      |                                %ld
lib/ubsan/ubsan.cpp:400:34: warning: format ‘%zu’ expects argument of type ‘size_t’, but argument 2 has type ‘ssize_t’ {aka ‘long int’} [-Wformat=]
  400 |         printf("shift exponent %zu is too large for %zu-bit type %s\n", rhs,
      |                                ~~^                                      ~~~
      |                                  |                                      |
      |                                  unsigned int                           ssize_t {aka long int}
      |                                %lu
lib/ubsan/ubsan.cpp: In function ‘void __ubsan_handle_vla_bound_not_positive(ubsan_vla_bound_data*, ssize_t)’:
lib/ubsan/ubsan.cpp:549:39: warning: format ‘%zd’ expects argument of type ‘signed size_t’, but argument 2 has type ‘ssize_t’ {aka ‘long int’} [-Wformat=]
  549 |     printf("vla bound not positive (%zd)\n", val);
      |                                     ~~^      ~~~
      |                                       |      |
      |                                       int    ssize_t {aka long int}
      |                                     %ld