maint: avoid new syntax-check failure

* cfg.mk (exclude_file_name_regexp--sc_prohibit_defined_have_decl_tests):
Exempt autoconf.texi's test of "#if defined HAVE_DECL_MALLOC".

1 files changed, 2 insertions, 0 deletions

diff --git a/cfg.mk b/cfg.mk
index a992abba..4300f04d 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -137,3 +137,5 @@ exclude_file_name_regexp--sc_useless_cpp_parens = \
 exclude_file_name_regexp--sc_trailing_blank = ^build-aux/texinfo\.tex$$
 exclude_file_name_regexp--sc_two_space_separator_in_usage = \
   ^build-aux/gnupload$$
+exclude_file_name_regexp--sc_prohibit_defined_have_decl_tests = \
+  ^doc/autoconf\.texi$$