Patch based on suggestion by Matthew Boyle <mlb@decisionsoft.co.uk> for dsniff >=
2.4b1 which avoids xdrs being used without being initialised first. Without this
patch dsniff segfaults when decoding RPC packets on x86_64. For further information
please also have a look to Red Hat Bugzilla ID #715042 and #850494.

--- dsniff-2.4/rpc.c				2001-03-15 09:33:04.000000000 +0100
+++ dsniff-2.4/rpc.c.rpc_segfault		2013-12-20 22:49:34.000000000 +0100
@@ -125,6 +125,9 @@
 			return (0);
 		}
 	}
+	else
+		return (0);
+	
 	stat = xdr_getpos(&xdrs);
 	xdr_destroy(&xdrs);