[PATCH] tdb: fix -std=c23 build failure

[Rudi Heitbaum <rudi@xxxxxxxxxxxx>]

gcc-15 switched to -std=c23 by default:

    https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=55e3bd376b2214e200fa76d12b67ff259b06c212

As a result `e2fsprogs` fails the build so only typedef int bool
for __STDC_VERSION__ <= 201710L (C17)

    ../../../lib/ext2fs/tdb.c:113:13: error: two or more data types in declaration specifiers
    ../../../lib/ext2fs/tdb.c:113:1: warning: useless type name in empty declaration
      113 | typedef int bool;
          | ^~~~~~~

Signed-off-by: Rudi Heitbaum <rudi@xxxxxxxxxxxx>
---
 lib/ext2fs/tdb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/ext2fs/tdb.c b/lib/ext2fs/tdb.c
index b07b2917..98dc95d8 100644
--- a/lib/ext2fs/tdb.c
+++ b/lib/ext2fs/tdb.c
@@ -110,7 +110,9 @@ static char *rep_strdup(const char *s)
 #endif
 #endif
 
+#if defined __STDC__ && defined __STDC_VERSION__ && __STDC_VERSION__ <= 201710L
 typedef int bool;
+#endif
 
 #include "tdb.h"
 
-- 
2.43.0