Add debug log lines for changes of the output state.

	modified:   block/block_oneshot.c

controller/block/block_oneshot.c

@@ -78,8 +78,10 @@ struct controller_block_private {
 static void calculate(struct controller_block *block)
 {
 	struct controller_block_private *priv;
+	bool last_out;
 
 	priv = block->private;
+	last_out = OUTPUT(out);
 	
 	if (INPUT(reset) == true) {
 		OUTPUT(out) = false;
@@ -89,9 +91,16 @@ static void calculate(struct controller_block *block)
 		OUTPUT(out) = true;
 		priv->ticks_left = priv->period;
 	} else {
-		if ((priv->ticks_left) && (--priv->ticks_left == 0))
+		if ((priv->ticks_left) && (--priv->ticks_left == 0)) {
 			OUTPUT(out) = false;
+		}
 	}
+
+#ifdef DEBUG
+	if (OUTPUT(out) != last_out)
+		log_send(LOG_T_DEBUG, "%s: turned %s", block->name,
+		OUTPUT(out) ? "on" : "off");
+#endif
 }
 
 static struct controller_block_interm_list interms[] = {