lib/igt_core: add printf attribute to igt_vlog

I didn't know that this also works for the varargs versions of
format strings. But gcc was kind enough to let me know.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/igt_core.h b/lib/igt_core.h
index 5c9065a5..a8bb28e1 100644
--- a/lib/igt_core.h
+++ b/lib/igt_core.h
@@ -389,6 +389,7 @@ enum igt_log_level {
 };
 __attribute__((format(printf, 2, 3)))
 void igt_log(enum igt_log_level level, const char *format, ...);
+__attribute__((format(printf, 2, 0)))
 void igt_vlog(enum igt_log_level level, const char *format, va_list args);
 
 /**