From c8565bf4f3bf1def1bb9cd89955454c120fab9a1 Mon Sep 17 00:00:00 2001
From: Albrecht Schlosser <albrechts.fltk@online.de>
Date: Mon, 1 Aug 2022 19:56:08 +0200
Subject: Fix Fl_Flex unsetting of set_size()

Don't add the widget to the array if size == 0 (unset) but it has
not been in the array (or it's called twice).
---
 src/Fl_Flex.cxx | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src')

diff --git a/src/Fl_Flex.cxx b/src/Fl_Flex.cxx
index ac1a8551f..e25741a03 100644
--- a/src/Fl_Flex.cxx
+++ b/src/Fl_Flex.cxx
@@ -287,6 +287,9 @@ void Fl_Flex::set_size(Fl_Widget *w, int size) {
     return;
   }
 
+  if (size == 0)
+    return;
+
   // add to array of fixed size widgets
   if (set_size_size_ == set_size_alloc_) {
     set_size_alloc_ = alloc_size(set_size_alloc_);
-- 
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