printer tree FEATURE printing subtree or node

Function tree_print_compiled_node is now implemented.
diff --git a/src/printer_schema.c b/src/printer_schema.c
index 4b8fed8..27853f5 100644
--- a/src/printer_schema.c
+++ b/src/printer_schema.c
@@ -191,7 +191,7 @@
 }
 
 API LY_ERR
-lys_print_node(struct ly_out *out, const struct lysc_node *node, LYS_OUTFORMAT format, size_t UNUSED(line_length), uint32_t options)
+lys_print_node(struct ly_out *out, const struct lysc_node *node, LYS_OUTFORMAT format, size_t line_length, uint32_t options)
 {
     LY_ERR ret;
 
@@ -208,10 +208,10 @@
     case LYS_OUT_YIN:
         ret = yin_print_parsed(out, module);
         break;
+    */
     case LYS_OUT_TREE:
         ret = tree_print_compiled_node(out, node, options, line_length);
         break;
-    */
     default:
         LOGERR(NULL, LY_EINVAL, "Unsupported output format.");
         ret = LY_EINVAL;