VPP-1573 fix crash in ip6 reassembly

Change-Id: I3a3076c7d87446b5ec2a02e70d3b6d05f1875875
Signed-off-by: Klement Sekera <ksekera@cisco.com>
diff --git a/src/vnet/ip/ip6_reassembly.c b/src/vnet/ip/ip6_reassembly.c
index ab5b42a..d78c3ff 100644
--- a/src/vnet/ip/ip6_reassembly.c
+++ b/src/vnet/ip/ip6_reassembly.c
@@ -770,6 +770,7 @@
 	    }
 	  *next0 = IP6_REASSEMBLY_NEXT_DROP;
 	  *error0 = IP6_ERROR_REASS_OVERLAPPING_FRAGMENT;
+	  return IP6_REASS_RC_OK;
 	}
       break;
     }
@@ -795,7 +796,6 @@
       else
 	{
 	  *next0 = IP6_REASSEMBLY_NEXT_DROP;
-	  ;
 	  *error0 = IP6_ERROR_REASS_DUPLICATE_FRAGMENT;
 	}
     }