Fixed the unit tests after integration of property-list property and device-object-property-reference properties. Thank you for noticing it was broken, Nikola Jelić, and for sending in fixes.

bacnet-stack/test/timesync.mak

@@ -24,6 +24,7 @@ SRCS := $(SRC_DIR)/bacdcode.c \
 	$(SRC_DIR)/bacreal.c \
 	$(SRC_DIR)/bacerror.c \
 	$(SRC_DIR)/bacapp.c \
+	$(SRC_DIR)/bacdevobjpropref.c \
 	$(SRC_DIR)/bactext.c \
 	$(SRC_DIR)/indtext.c \
 	$(SRC_DIR)/datetime.c \
@@ -34,7 +35,7 @@ SRCS := $(SRC_DIR)/bacdcode.c \
 OBJS := ${SRCS:.c=.o}
 
 all: ${TARGET}
- 
+
 ${TARGET}: ${OBJS}
 	${CC} -o $@ ${OBJS}