Merge pull request #1444 from harfbuzz/cff-assert

removed assert, fixes https://github.com/harfbuzz/harfbuzz/issues/1443
diff --git a/src/hb-ot-cff1-table.hh b/src/hb-ot-cff1-table.hh
index 7bed263..01c0e43 100644
--- a/src/hb-ot-cff1-table.hh
+++ b/src/hb-ot-cff1-table.hh
@@ -654,6 +654,7 @@
   static inline enum NameDictValIndex name_op_to_index (OpCode op)
   {
     switch (op) {
+      default:
       case OpCode_version:
 	return version;
       case OpCode_Notice:
@@ -670,8 +671,6 @@
 	return postscript;
       case OpCode_FontName:
 	return fontName;
-      default:
-	assert (0);
       }
   }