[HarfBuzz] harfbuzz: Branch 'master'

[Behdad Esfahbod]

 src/hb-ot-tag.cc |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

New commits:
commit 80c1b01f054c5d65ca96a568aaf1c28ffe97215b
Author: David Corbett <corbett.dav at husky.neu.edu>
Date:   Tue Dec 5 08:28:42 2017 -0500

    Allow digits in language system tags

diff --git a/src/hb-ot-tag.cc b/src/hb-ot-tag.cc
index 0514c41a..1338c317 100644
--- a/src/hb-ot-tag.cc
+++ b/src/hb-ot-tag.cc
@@ -920,7 +920,7 @@ hb_ot_tag_from_language (hb_language_t language)
     char tag[4];
     int i;
     s += 6;
-    for (i = 0; i < 4 && ISALPHA (s[i]); i++)
+    for (i = 0; i < 4 && ISALNUM (s[i]); i++)
       tag[i] = TOUPPER (s[i]);
     if (i) {
       for (; i < 4; i++)