[PATCH 1/3] shared/ad: 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 `bluez` fails the build as:

    src/shared/ad.c:1090:24: error: incompatible types when returning type '_Bool' but 'const char *' was expected
     1090 |                 return false;
          |                        ^~~~~

Signed-off-by: Rudi Heitbaum <rudi@xxxxxxxxxxxx>
---
 src/shared/ad.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/shared/ad.c b/src/shared/ad.c
index d08ce7af9..dac381bbe 100644
--- a/src/shared/ad.c
+++ b/src/shared/ad.c
@@ -1087,7 +1087,7 @@ bool bt_ad_add_name(struct bt_ad *ad, const char *name)
 const char *bt_ad_get_name(struct bt_ad *ad)
 {
 	if (!ad)
-		return false;
+		return NULL;
 
 	return ad->name;
 }
-- 
2.43.0