From 74bbfcfaa668fd0e35b41c04b18f7a15f5419833 Mon Sep 17 00:00:00 2001
From: ocornut <omarcornut@gmail.com>
Date: Wed, 29 Jun 2016 10:07:36 +0200
Subject: [PATCH] ImGuiListClipper: fixed automatic-height calc path dumbly
 having user display element 0 twice (#661, #716)

First bug out of two. Was easily visible using e.g. 50% alpha text.
---
 imgui.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/imgui.cpp b/imgui.cpp
index 904cef81..a9f9dbaa 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -1680,8 +1680,9 @@ bool ImGuiListClipper::Step()
         if (ItemsCount == 1) { ItemsCount = -1; return false; }
         float items_height = ImGui::GetCursorPosY() - StartPosY;
         IM_ASSERT(items_height > 0.0f);   // If this triggers, it means Item 0 hasn't moved the cursor vertically
-        ImGui::SetCursorPosY(StartPosY);  // Rewind cursor so we can Begin() again, this time with a known height.
-        Begin(ItemsCount, items_height);
+        Begin(ItemsCount-1, items_height);
+        DisplayStart++;
+        DisplayEnd++;
         StepNo = 3;
         return true;
     }