Fix for -fno-common: remove unused variable duplicated in ArgusUdp.c

Index: argus/ArgusUdt.c
--- argus/ArgusUdt.c.orig
+++ argus/ArgusUdt.c
@@ -40,9 +40,6 @@
 #include <argus_compat.h>
 #include <ArgusModeler.h>
 
-#include <argus/bootp.h>
-struct bootp *bp;
-
 struct ArgusSystemFlow *
 ArgusCreateUDTFlow (struct ArgusModelerStruct *model, struct udt_header *udt)
 {