Fix BACnet/IP builds for BBMD clients without BBMD tables. (#523)

* Fix BACnet/IP builds for BBMD clients without BBMD tables.

* added BBMD=client to pipeline build

---------

Co-authored-by: Steve Karg <skarg@users.sourceforge.net>

src/bacnet/basic/bbmd/h_bbmd.c

@@ -77,11 +77,12 @@ static bool BVLC_NAT_Handling = false;
 static BACNET_IP_ADDRESS Remote_BBMD;
 /** if we are a foreign device, store the Time-To-Live Seconds here */
 static uint16_t Remote_BBMD_TTL_Seconds;
-#if BBMD_ENABLED
+#if BBMD_ENABLED || BBMD_CLIENT_ENABLED
 /* local buffer & length for sending */
 static uint8_t BVLC_Buffer[BIP_MPDU_MAX];
 static uint16_t BVLC_Buffer_Len;
-/* Broadcast Distribution Table */
+#endif
+#if BBMD_ENABLED/* Broadcast Distribution Table */
 #ifndef MAX_BBMD_ENTRIES
 #define MAX_BBMD_ENTRIES 128
 #endif
@@ -255,6 +256,8 @@ void bvlc_maintenance_timer(uint16_t seconds)
 {
 #if BBMD_ENABLED
     bvlc_foreign_device_table_maintenance_timer(&FD_Table[0], seconds);
+#else
+    (void)seconds;
 #endif
 }