Fix (most) compilation warnings in Intel C++ Compiler (#38)

* Use BACNET_OBJECT_TYPE for all object type variables.

* Fix ICC "mixing enumerated type" warnings for assignments and parameters.

* Network Port: Use enums for state structs and remove erroneous bounds checks copy-pasted from IP_Subnet_Prefix setter.

* Fix ICC "unreachable statement" warnings.

* Fix ICC "unused variable" warnings when printing is disabled.

* Fix ICC "mixing enumerated type" warnings for struct initializers { 0 } by ensuring the first member is an integer type.

* Send_GetEvent_Global: Return 0 (invalid TSM invoke ID) instead of -1 = 255 (technically valid invoke ID) on failure.

* Fix ICC "pointless comparison" warnings.

* Fix wrong import in objects.c (memset being used).

* Fix signedness warnings and inconsistencies. Include -1 = 255 check in cov_address_get().

* Add some guards for BACAPP_LIGHTING_COMMAND to avoid errors/warnings.

* RPM test fixes

* Address requested changes. (#38)

src/bacnet/basic/service/h_rr.c

@@ -109,7 +109,9 @@ void handler_read_range(uint8_t *service_request,
     int pdu_len = 0;
     BACNET_NPDU_DATA npdu_data;
     bool error = false;
+#if PRINT_ENABLED
     int bytes_sent = 0;
+#endif
     BACNET_ADDRESS my_address;
 
     data.error_class = ERROR_CLASS_OBJECT;
@@ -180,7 +182,10 @@ void handler_read_range(uint8_t *service_request,
     }
 RR_ABORT:
     pdu_len += len;
-    bytes_sent = datalink_send_pdu(
+#if PRINT_ENABLED
+    bytes_sent =
+#endif
+    datalink_send_pdu(
         src, &npdu_data, &Handler_Transmit_Buffer[0], pdu_len);
 #if PRINT_ENABLED
     if (bytes_sent <= 0)