More wxSTC tweaks

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@20092 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

contrib/src/stc/PlatWX.cpp

@@ -906,6 +906,10 @@ PRectangle ListBoxImpl::GetDesiredRect() {
         maxh = count * rect.GetHeight();
         if (maxh > 140)  // TODO:  Use desiredVisibleRows??
             maxh = 140;
+
+        // Try to make the size an exact multiple of some number of lines
+        int lines = maxh / rect.GetHeight();
+        maxh = (lines + 1) * rect.GetHeight() + 2;
     }
     else
         maxh = 100;