From ce9d05ec7beb9ca4280b79e7252425cdb2f9c7f1 Mon Sep 17 00:00:00 2001
From: Markus Gans <guru@server.home.net>
Date: Mon, 29 Oct 2018 19:10:42 +0100
Subject: [PATCH] Fix FListBox prevListItem() + nextListItem()

---
 src/flistbox.cpp | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/src/flistbox.cpp b/src/flistbox.cpp
index 3baa61c5..83bae776 100644
--- a/src/flistbox.cpp
+++ b/src/flistbox.cpp
@@ -1532,17 +1532,17 @@ void FListBox::prevListItem (int distance)
   if ( current == 1 )
     return;
 
-  if ( current < std::size_t(distance) )
+  if ( current <= std::size_t(distance) )
     current = 1;
   else
     current -= std::size_t(distance);
 
   if ( current <= std::size_t(yoffset) )
   {
-    yoffset -= distance;
-
-    if ( yoffset < 0 )
+    if ( yoffset < distance )
       yoffset = 0;
+    else
+      yoffset -= distance;
   }
 }
 
@@ -1555,17 +1555,17 @@ void FListBox::nextListItem (int distance)
   if ( current == element_count )
     return;
 
-  current += std::size_t(distance);
-
-  if ( current > element_count )
+  if ( current + std::size_t(distance) > element_count  )
     current = element_count;
+  else
+    current += std::size_t(distance);
 
   if ( current - std::size_t(yoffset) > getClientHeight() )
   {
-    yoffset += distance;
-
-    if ( yoffset > yoffset_end )
+    if ( yoffset > yoffset_end - distance )
       yoffset = yoffset_end;
+    else
+      yoffset += distance;
   }
 }
 //----------------------------------------------------------------------