Merge branch 'dgud/wx/fix-wx-2.9-compat/OTP-10407'

* dgud/wx/fix-wx-2.9-compat/OTP-10407: (26 commits)
  wx: Fix comments
  wx: Workaround wx-2.9 bugs
  wx: Mac fixes
  wx: Fix demo and tests
  wx: Allow 64 bits compilation on mac, requires wxWidgets-2.9
  appmon: Move runtime part to runtime_tools app
  reltool: fix wxWidgets-2.9 compability
  debugger: Fix 2.9 compat
  observer: Fix check for graphics contexts
  Observer: Fix distribution dialog
  observer: Fix font sizes
  wx: Fix the demo
  wx: Fix loading icons and cursors in Windows
  wx: Remove unnecessary casts
  wx: Fix changed getfunctions
  wx: Depricate wxCursor new functions
  wx: Fix int to enum
  wx: Include correct m4 file in 2.9
  wx: Update examples so they work with both wxWidgets 2.8 and 2.9
  wx: Modify tests so they work on wxWidgets-2.9
  ...

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/observer/src/observer_pro_wx.erl b/lib/observer/src/observer_pro_wx.erl
index ee67664539..9aaf648ea2 100644
--- a/lib/observer/src/observer_pro_wx.erl
+++ b/lib/observer/src/observer_pro_wx.erl
@@ -225,7 +225,7 @@ handle_info({holder_updated, Count}, State0=#state{grid=Grid}) ->
     State = update_selection(State0),
 
     wxListCtrl:setItemCount(Grid, Count),
-    wxListCtrl:refreshItems(Grid, 0, Count-1),
+    Count > 0 andalso wxListCtrl:refreshItems(Grid, 0, Count-1),
 
     {noreply, State};