[PULL 17/22] util/uuid: Define UUID_STR_LEN from UUID_NONE string

[Cédric Le Goater]

Cc: Fam Zheng <fam@euphon.net>
Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 include/qemu/uuid.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/qemu/uuid.h b/include/qemu/uuid.h
index 
356efe7b5797911640ed347fc08f4ef5ebbd0476..869f84af09ddc4aa80d53e133c323781ade4d190
 100644
--- a/include/qemu/uuid.h
+++ b/include/qemu/uuid.h
@@ -78,9 +78,10 @@ typedef struct {
                  "%02hhx%02hhx-" \
                  "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx"
 
-#define UUID_STR_LEN (36 + 1)
-
 #define UUID_NONE "00000000-0000-0000-0000-000000000000"
+QEMU_BUILD_BUG_ON(sizeof(UUID_NONE) - 1 != 36);
+
+#define UUID_STR_LEN sizeof(UUID_NONE)
 
 void qemu_uuid_generate(QemuUUID *out);
 
-- 
2.41.0