meta-flow: Fix ip_frag handling in mf_set_wild().

The wildcard bits were set when they should have been cleared.

Found by inspection.

Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>

lib/meta-flow.c

@@ -1508,7 +1508,7 @@ mf_set_wild(const struct mf_field *mf, struct match *match)
         break;
 
     case MFF_IP_FRAG:
-        match->wc.masks.nw_frag |= FLOW_NW_FRAG_MASK;
+        match->wc.masks.nw_frag &= ~FLOW_NW_FRAG_MASK;
         match->flow.nw_frag &= ~FLOW_NW_FRAG_MASK;
         break;