zebra: backpressure - Fix Null ptr access (Coverity Issue)

Fix dereferencing NULL ptr making coverity happy.

Ticket :#3390099

Signed-off-by: Rajasekar Raja <[email protected]>

Author: raja-rajasekar

bgpd/bgp_zebra.c

@@ -1781,8 +1781,13 @@ static void bgp_handle_route_announcements_to_zebra(struct event *e)
 			break;
 
 		table = bgp_dest_table(dest);
+		/*
+		 * Table cannot be NULL.
+		 * This logic of new zebra list is not applicable during cleanup.
+		 */
+		assert(table);
 		install = CHECK_FLAG(dest->flags, BGP_NODE_SCHEDULE_FOR_INSTALL);
-		if (table && table->afi == AFI_L2VPN && table->safi == SAFI_EVPN)
+		if (table->afi == AFI_L2VPN && table->safi == SAFI_EVPN)
 			is_evpn = true;
 
 		if (BGP_DEBUG(zebra, ZEBRA))