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/lso.c

@@ -66,7 +66,7 @@ int lso_encode_apdu(uint8_t *apdu, uint8_t invoke_id, BACNET_LSO_DATA *data)
          */
 
         len = encode_context_object_id(&apdu[apdu_len], 3,
-            (int)data->targetObject.type, data->targetObject.instance);
+            data->targetObject.type, data->targetObject.instance);
 
         apdu_len += len;
     }
@@ -115,7 +115,7 @@ int lso_decode_service_request(
             }
             len += section_length;
         } else {
-            data->targetObject.type = 0;
+            data->targetObject.type = OBJECT_NONE;
             data->targetObject.instance = 0;
         }
         return len;