git: 3cfcbbfaf83a - main - cdefs.h __generic: avoid gcc -Wunused-value

The branch main has been updated by rlibby:

URL: https://cgit.FreeBSD.org/src/commit/?id=3cfcbbfaf83aa0a61c1fd72cb1e82a011b08bc83

commit 3cfcbbfaf83aa0a61c1fd72cb1e82a011b08bc83
Author:     Ryan Libby <rlibby@FreeBSD.org>
AuthorDate: 2024-07-02 19:12:59 +0000
Commit:     Ryan Libby <rlibby@FreeBSD.org>
CommitDate: 2024-07-02 19:12:59 +0000

    cdefs.h __generic: avoid gcc -Wunused-value
    
    Fixup after
    9d2f97981755 <sys/cdefs.h>: Decay expression passed to fallback version of __generic()
    
    Reviewed by:    imp, jrtc27, kib
    Differential Revision:  https://reviews.freebsd.org/D45825
---
 sys/sys/cdefs.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/sys/cdefs.h b/sys/sys/cdefs.h
index 53ac1b1c3f92..7c4890ece8d5 100644
--- a/sys/sys/cdefs.h
+++ b/sys/sys/cdefs.h
@@ -244,8 +244,8 @@
 	_Generic(expr, t: yes, default: no)
 #elif !defined(__cplusplus)
 #define	__generic(expr, t, yes, no)					\
-	__builtin_choose_expr(						\
-	    __builtin_types_compatible_p(__typeof((0, (expr))), t), yes, no)
+	__builtin_choose_expr(__builtin_types_compatible_p(		\
+	    __typeof(((void)0, (expr))), t), yes, no)
 #endif
 
 /*