log: Use a do {} while (0) for tlog

Avoid the warning `-Wempty-body`.

diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index 7f12344..3c1583d 100644 (file)
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -63,7 +63,7 @@
 #ifdef TRACE
 #   define ff_tlog(ctx, ...) av_log(ctx, AV_LOG_TRACE, __VA_ARGS__)
 #else
-#   define ff_tlog(ctx, ...) while(0)
+#   define ff_tlog(ctx, ...) do { } while (0)
 #endif