Fixed BACNET_APPLICATION_DATA_VALUE declarations to be initialized so that the next pointer is NULL by default. (#814)

src/bacnet/basic/object/bitstring_value.c

@@ -636,7 +636,7 @@ bool BitString_Value_Write_Property(BACNET_WRITE_PROPERTY_DATA *wp_data)
 {
     bool status = false; /* return value */
     int len = 0;
-    BACNET_APPLICATION_DATA_VALUE value;
+    BACNET_APPLICATION_DATA_VALUE value = { 0 };
 
     if (wp_data == NULL) {
         return false;