Fixed device object compile errors and added IPv6 recipes for blinkt and piface (#841)

apps/blinkt/device.c

@@ -40,10 +40,6 @@
 #include "bacnet/basic/object/color_temperature.h"
 #endif
 
-/* local forward (semi-private) and external prototypes */
-int Device_Read_Property_Local(BACNET_READ_PROPERTY_DATA *rpdata);
-bool Device_Write_Property_Local(BACNET_WRITE_PROPERTY_DATA *wp_data);
-
 /* may be overridden by outside table */
 static object_functions_t *Object_Table;
 
@@ -924,7 +920,7 @@ int Device_Object_List_Element_Encode(
  * @return True on success or else False if not found.
  */
 bool Device_Valid_Object_Name(
-    BACNET_CHARACTER_STRING *object_name1,
+    const BACNET_CHARACTER_STRING *object_name1,
     BACNET_OBJECT_TYPE *object_type,
     uint32_t *object_instance)
 {