list_window: check for unchanged value in set_length()

Minor optimization.

diff --git a/src/list_window.c b/src/list_window.c
index 822805c9b186b7f3d6345ec3499ad04a76a38840..4fe984dea796425c121e23ce3dc4e3df94aac3fd 100644 (file)
--- a/src/list_window.c
+++ b/src/list_window.c
@@ -127,6 +127,9 @@ list_window_resize(struct list_window *lw, unsigned width, unsigned height)
 void
 list_window_set_length(struct list_window *lw, unsigned length)
 {
+       if (length == lw->length)
+               return;
+
        lw->length = length;
 
        list_window_check_selected(lw);