Fixed defects

List of Defects

Error: GCC_ANALYZER_WARNING (CWE-457): [#def1]
libgpg-error-1.48-build/libgpg-error-1.48/src/argparse.c:39: included_from: Included from here.
libgpg-error-1.48-build/libgpg-error-1.48/src/argparse.c: scope_hint: In function '_gpgrt_argparse.part.0'
libgpg-error-1.48-build/libgpg-error-1.48/src/argparse.c:1772:25: warning[-Wanalyzer-use-of-uninitialized-value]: use of uninitialized value 'keyword[0]'
libgpg-error-1.48-build/libgpg-error-1.48/src/gpgrt-int.h:579:5: note: in definition of macro 'gpgrt_assert'
libgpg-error-1.48-build/libgpg-error-1.48/src/gpgrt-int.h:579:5: note: in definition of macro 'gpgrt_assert'
libgpg-error-1.48-build/libgpg-error-1.48/src/gpgrt-int.h:579:5: note: in definition of macro 'gpgrt_assert'
# 1770|           {
# 1771|             /* We are at the end of a line.  */
# 1772|->           gpgrt_assert (*keyword == '[');
# 1773|             trim_spaces (keyword+1);
# 1774|             if (!keyword[1])

Error: GCC_ANALYZER_WARNING (CWE-775): [#def2]
libgpg-error-1.48-build/libgpg-error-1.48/src/spawn-posix.c: scope_hint: In function 'do_exec'
libgpg-error-1.48-build/libgpg-error-1.48/src/spawn-posix.c:316:23: warning[-Wanalyzer-fd-leak]: leak of file descriptor 'dup2(fds[i], i)'
#  314|         if (nodevnull[i])
#  315|           continue;
#  316|->       if (fds[i] != i && dup2 (fds[i], i) == -1)
#  317|           _gpgrt_log_fatal ("dup2 std%s failed: %s\n",
#  318|                             i==0?"in":i==1?"out":"err", strerror (errno));

Error: GCC_ANALYZER_WARNING: [#def3]
libgpg-error-1.48-build/libgpg-error-1.48/src/spawn-posix.c:316:26: warning[-Wanalyzer-fd-use-without-check]: 'dup2' on possibly invalid file descriptor '-1'
#  314|         if (nodevnull[i])
#  315|           continue;
#  316|->       if (fds[i] != i && dup2 (fds[i], i) == -1)
#  317|           _gpgrt_log_fatal ("dup2 std%s failed: %s\n",
#  318|                             i==0?"in":i==1?"out":"err", strerror (errno));

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