Snippets for altermime 0.3.10 from Fedora s390x

Sourced from https://kojipkgs.fedoraproject.org/packages/altermime/0.3.10/39.fc45/data/logs/s390x/build.log.

mime_alter.c:2435:13: warning: variable ‘segment_read’ set but not used [-Wunused-but-set-variable=]
 2435 |         int segment_read = 0;
      |             ^~~~~~~~~~~~

mime_alter.c:3701:13: warning: variable ‘boundary_exists’ set but not used [-Wunused-but-set-variable=]
 3701 |         int boundary_exists=0;
      |             ^~~~~~~~~~~~~~~

pldstr.c:300:37: warning: comparison between pointer and zero character constant [-Wpointer-compare]
  300 |         if ((st->start)&&(st->start != '\0'))
      |                                     ^~

mime_alter.c:1509:59: warning: ‘__snprintf_chk’ output may be truncated before the last format character [-Wformat-truncation=]
 1509 |                 snprintf(boundary, sizeof(boundary), "--%s", dd->boundary);
      |                                                           ^

MIME_headers.c:1089:15: warning: variable ‘headerline_end’ set but not used [-Wunused-but-set-variable=]
 1089 |         char *headerline_end;
      |               ^~~~~~~~~~~~~~

MIME_headers.c:1084:13: warning: variable ‘firstline’ set but not used [-Wunused-but-set-variable=]
 1084 |         int firstline = 1;
      |             ^~~~~~~~~

mime_alter.c:3459:67: warning: ‘snprintf’ output may be truncated before the last format character [-Wformat-truncation=]
 3459 |                         snprintf( low_line, AM_1K_BUFFER_SIZE, "%s", line );
      |                                                                   ^

MIME_headers.c:2727:15: warning: variable ‘safeh’ set but not used [-Wunused-but-set-variable=]
 2727 |         char *safeh, *h, *safehl;
      |               ^~~~~

MIME_headers.c:2948:9: warning: ‘memset’ used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
 2948 |         memset(hinfo->defects, 0, _MIMEH_DEFECT_ARRAY_SIZE);
      |         ^~~~~~

MIME_headers.c:788:64: warning: ‘/doubleCR.’ directive output may be truncated writing 10 bytes into a region of size between 0 and 1023 [-Wformat-truncation=]
  788 |                 snprintf(glb.doubleCRname,_MIMEH_STRLEN_MAX,"%s/doubleCR.%d",glb.output_dir,glb.doubleCR_count);
      |                                                                ^~~~~~~~~~

MIME_headers.c:2014:93: warning: ‘%s’ directive output may be truncated writing up to 1023 bytes into a region of size 129 [-Wformat-truncation=]
 2014 |                                         snprintf(hinfo->filename, sizeof(hinfo->filename), "%s.applemeta", glb.appledouble_filename );
      |                                                                                             ^~             ~~~~~~~~~~~~~~~~~~~~~~~~

/usr/include/bits/stdio2.h:68:10: warning: ‘__snprintf_chk’ specified bound 1024 exceeds destination size 129 [-Wstringop-overflow=]
   68 |   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   69 |                                    __glibc_objsize (__s), __fmt,
      |                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   70 |                                    __va_arg_pack ());
      |                                    ~~~~~~~~~~~~~~~~~

qpe.c:49:29: warning: comparison between pointer and zero character constant [-Wpointer-compare]
   49 |                 if (lineend != '\0') {
      |                             ^~

MIME_headers.c:2875:50: warning: ‘%s’ directive output may be truncated writing up to 128 bytes into a region of size 124 [-Wformat-truncation=]
 2875 |                 snprintf( tmp, sizeof(tmp), "mac-%s", hinfo->filename );
      |                                                  ^~

/usr/include/bits/stdio2.h:68:10: warning: ‘__builtin___snprintf_chk’ specified bound 1024 exceeds destination size 129 [-Wstringop-overflow=]
   68 |   return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
      |          ^