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/wp.h

@@ -34,8 +34,9 @@
    It could also have more than one value or element.  */
 
 typedef struct BACnet_Write_Property_Data {
-    BACNET_OBJECT_TYPE object_type;
+    /* number type first to avoid enum cast warning on = { 0 } */
     uint32_t object_instance;
+    BACNET_OBJECT_TYPE object_type;
     BACNET_PROPERTY_ID object_property;
     uint32_t array_index;       /* use BACNET_ARRAY_ALL when not setting */
     uint8_t application_data[MAX_APDU];