[ot] Make sure all toplevel tables have tableTag
diff --git a/src/hb-open-file-private.hh b/src/hb-open-file-private.hh
index 57db59d..7500c32 100644
--- a/src/hb-open-file-private.hh
+++ b/src/hb-open-file-private.hh
@@ -197,6 +197,8 @@
struct OpenTypeFontFile
{
+ static const hb_tag_t tableTag = HB_TAG ('_','_','_','_'); /* Sanitizer needs this. */
+
static const hb_tag_t CFFTag = HB_TAG ('O','T','T','O'); /* OpenType with Postscript outlines */
static const hb_tag_t TrueTypeTag = HB_TAG ( 0 , 1 , 0 , 0 ); /* OpenType with TrueType outlines */
static const hb_tag_t TTCTag = HB_TAG ('t','t','c','f'); /* TrueType Collection */
