[PATCH weston v2] clients/stacking: Silence a compiler warning

[Armin Krezović]

This patch fixes a compiler warning when building with
clang, since it doesn't support gnu_printf attribute.

v2:

 - Switch to WL_PRINTF per suggestion from Eric Engestrom.

Signed-off-by: Armin Krezović <krezovic.armin at gmail.com>
---
 clients/stacking.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clients/stacking.c b/clients/stacking.c
index 4285a17..7c711e4 100644
--- a/clients/stacking.c
+++ b/clients/stacking.c
@@ -184,7 +184,7 @@ fullscreen_handler(struct window *window, void *data)
 
 static void
 draw_string(cairo_t *cr,
-            const char *fmt, ...) __attribute__((format (gnu_printf, 2, 3)));
+            const char *fmt, ...) WL_PRINTF(2,3);
 
 static void
 draw_string(cairo_t *cr,
-- 
2.10.0