Snippets for a52dec 0.8.0 from FreeBSD 151amd64

Sourced from https://pkg-status.freebsd.org/beefy23/data/latest-per-pkg/liba52/0.8.0_2/151amd64-default.log.

downmix.c:70:50: warning: floating-point comparison is always false; constant cannot be represented exactly in type 'float' [-Wliteral-range]
   70 |         (input == A52_DOLBY || (input == A52_3F && clev == LEVEL (LEVEL_3DB))))
      |                                                    ~~~~ ^  ~~~~~~~~~~~~~~~~~

getopt.c:215:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  215 | my_index (str, chr)
      | ^

getopt.c:305:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  305 | exchange (argv)
      | ^

getopt.c:390:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  390 | _getopt_initialize (argc, argv, optstring)
      | ^

getopt.c:403:28: warning: passing arguments to 'getenv' without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  403 |   posixly_correct = getenv ("POSIXLY_CORRECT");
      |                            ^

getopt.c:512:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  512 | _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
      | ^

getopt.c:972:1: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  972 | getopt (argc, argv, optstring)
      | ^

./getopt.h:136:12: warning: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C23, conflicting with a subsequent definition [-Wdeprecated-non-prototype]
  136 | extern int getopt ();
      |            ^

a52dec.c:163:24: warning: passing arguments to 'getopt' without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
  163 |     while ((c = getopt (argc, argv, "hs::t:Tcrag:o:")) != -1)
      |                        ^

extract_a52.c:61:24: warning: passing arguments to 'getopt' without a prototype is deprecated in all versions of C and is not supported in C23 [-Wdeprecated-non-prototype]
   61 |     while ((c = getopt (argc, argv, "hs:t:T")) != -1)
      |                        ^