[Heimdal-source-changes] [heimdal/heimdal] 1a6561: Check some error returns from *asprintf()

[Andrew Bartlett]

  Branch: refs/heads/master
  Home:   https://github.com/heimdal/heimdal
  Commit: 1a65611f61c240cb58a1620c7ddf9699865ac866
      https://github.com/heimdal/heimdal/commit/1a65611f61c240cb58a1620c7ddf9699865ac866
  Author: Andrew Bartlett <abartlet at samba.org>
  Date:   2020-05-27 (Wed, 27 May 2020)

  Changed paths:
    M kdc/kerberos5.c
    M lib/base/expand_path.c
    M lib/base/log.c
    M lib/gssapi/mech/context.c

  Log Message:
  -----------
  Check some error returns from *asprintf()

This avoids these compiler warnings on Ubuntu 18.04
gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)

expand_path.c: In function ‘expand_token’:
expand_path.c:493:17: warning: ignoring return value of ‘asprintf’, declared with attribute warn_unused_result [-Wunused-result]
                 asprintf(&arg, "%.*s", (int)(token_end - colon - 1), colon + 1);
                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
log.c: In function ‘fmtkv’:
log.c:646:5: warning: ignoring return value of ‘vasprintf’, declared with attribute warn_unused_result [-Wunused-result]
     vasprintf(&buf1, fmt, ap);
     ^~~~~~~~~~~~~~~~~~~~~~~~~

mech/context.c: In function ‘gss_mg_set_error_string’:
mech/context.c:212:5: warning: ignoring return value of ‘vasprintf’, declared with attribute warn_unused_result [-Wunused-result]
     (void) vasprintf(&str, fmt, ap);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mech/context.c: In function ‘_gss_mg_log_name’:
mech/context.c:319:6: warning: ignoring return value of ‘vasprintf’, declared with attribute warn_unused_result [-Wunused-result]
      (void) vasprintf(&str, fmt, ap);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mech/context.c: In function ‘_gss_mg_log_cred’:
mech/context.c:346:5: warning: ignoring return value of ‘vasprintf’, declared with attribute warn_unused_result [-Wunused-result]
     (void) vasprintf(&str, fmt, ap);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

kerberos5.c: In function ‘_kdc_set_e_text’:
kerberos5.c:338:5: warning: ignoring return value of ‘vasprintf’, declared with attribute warn_unused_result [-Wunused-result]
     vasprintf(&e_text, fmt, ap);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Andrew Bartlett <abartlet at samba.org>