openflow_input: add discriminator to of_table_feature_prop
diff --git a/openflow_input/standard-1.3 b/openflow_input/standard-1.3
index 6248005..337d16c 100644
--- a/openflow_input/standard-1.3
+++ b/openflow_input/standard-1.3
@@ -1383,7 +1383,7 @@
 // FIXME: These are padded to 8 byte align beyond the length indicated
 
 struct of_table_feature_prop {
-    uint16_t         type;
+    uint16_t         type == ?;
     uint16_t         length;
 };