Don't use vsnprintf when HB_NO_BUFFER_MESSAGE is defined
diff --git a/src/hb-config.hh b/src/hb-config.hh
index fd5a713..8bdce35 100644
--- a/src/hb-config.hh
+++ b/src/hb-config.hh
@@ -52,6 +52,7 @@
 #define HB_DISABLE_DEPRECATED
 #define HB_NDEBUG
 #define HB_NO_ATEXIT
+#define HB_NO_BUFFER_MESSAGE
 #define HB_NO_BUFFER_SERIALIZE
 #define HB_NO_BITMAP
 #define HB_NO_CFF