Corrected the server bit in the abort PDU which was missing for the abort messages.

bacnet-stack/demo/writefile/writefile.c

@@ -75,11 +75,12 @@ static void Atomic_Read_File_Error_Handler(BACNET_ADDRESS * src,
 }
 
 void MyAbortHandler(BACNET_ADDRESS * src,
-    uint8_t invoke_id, uint8_t abort_reason)
+    uint8_t invoke_id, uint8_t abort_reason, bool server)
 {
     /* FIXME: verify src and invoke id */
     (void) src;
     (void) invoke_id;
+    (void) server;
     printf("\r\nBACnet Abort!\r\n");
     printf("Abort Reason: %s\r\n",
         bactext_abort_reason_name(abort_reason));