[sfnt] Another fix for buggy variation fonts.

Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=759

* src/sfnt/sfobjs.c (sfnt_init_face): While setting number of
instances to zero for `CFF' fonts table, ensure that there is no
`CFF2' present also (which gets priority).
diff --git a/ChangeLog b/ChangeLog
index 8d428e3..b115836 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2017-03-08  Werner Lemberg  <wl@gnu.org>
+
+	[sfnt] Another fix for buggy variation fonts.
+
+	Reported as
+
+	  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=759
+
+	* src/sfnt/sfobjs.c (sfnt_init_face): While setting number of
+	instances to zero for `CFF' fonts table, ensure that there is no
+	`CFF2' present also (which gets priority).
+
 2017-03-07  Werner Lemberg  <wl@gnu.org>
 
 	[sfnt] Improve handling for buggy variation fonts.