flow/bypass: Properly set the ICMP emergency-bypassed value

Currently the ICMP emergency-bypassed value defined in suricata.conf is
overwriting the UDP value rather than correctly setting it for ICMP.
This commit corrects this bug so that the ICMP value can be set as
expected.

src/flow.c

@@ -978,7 +978,7 @@ void FlowInitFlowProto(void)
                                             strlen(emergency_bypassed),
                                             emergency_bypassed) > 0) {
 
-                flow_timeouts_emerg[FLOW_PROTO_UDP].bypassed_timeout = configval;
+                flow_timeouts_emerg[FLOW_PROTO_ICMP].bypassed_timeout = configval;
             }
         }
     }