fix divide by 0 bug in UpdateScrollbars() (part of patch 1716763)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48721 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/univ/textctrl.cpp b/src/univ/textctrl.cpp
index d8816f8974c3566a829f92a84aed9a5e5f857336..00e987b8005cb36472b0226efb50d52d6b232df3 100644 (file)
--- a/src/univ/textctrl.cpp
+++ b/src/univ/textctrl.cpp
@@ -3615,8 +3615,12 @@ void wxTextCtrl::UpdateScrollbars()
 
         if ( scrollRangeXOld )
         {
-            x *= scrollRangeX - m_rectText.width / charWidth;
-            x /= scrollRangeXOld - m_rectText.width / charWidth;
+            const int w = m_rectText.width / charWidth;
+            if ( w != scrollRangeXOld )
+            {
+                x *= scrollRangeX - w;
+                x /= scrollRangeXOld - w;
+            }
             Scroll(x, y);
         }