Merged revision(s) 3031 from branches/releases/bacnet-stack-0-8-0:

Added checks for OPTIONAL context tagged decoding to be sure it is not a closing tag.
Added makefile for unit test in bacdevobjpropref.c module, and improved unit test.
https://sourceforge.net/p/bacnet/bugs/49/
........

bacnet-stack/include/bacdevobjpropref.h

@@ -89,6 +89,11 @@ extern "C" {
         uint8_t tag_number,
         BACNET_DEVICE_OBJECT_REFERENCE * value);
 
+#ifdef TEST
+#include "ctest.h"
+    void testBACnetDeviceObjectPropertyReference(
+        Test * pTest);
+#endif
 
 #ifdef __cplusplus
 }