yanglint BUGFIX delayed string printing

... at the output of the xpath option.
diff --git a/tools/lint/common.c b/tools/lint/common.c
index f177527..4afba03 100644
--- a/tools/lint/common.c
+++ b/tools/lint/common.c
@@ -588,6 +588,8 @@
                             key->schema->name, lyd_get_value(key));
                 }
                 printf(")\n");
+            } else {
+                printf("\n");
             }
         }
     }