Replace create_from_file with empty blob if HB_NO_OPEN is defined
diff --git a/src/main.cc b/src/main.cc
index 490b76e..0aa4a5b 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -38,6 +38,10 @@
 
 using namespace OT;
 
+#ifdef HB_NO_OPEN
+#define hb_blob_create_from_file(x)  hb_blob_get_empty ()
+#endif
+
 int
 main (int argc, char **argv)
 {