int wxComboBox::DoInsert(const wxString& item, int pos)
{
wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list"));
- wxCHECK_MSG((pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));
+ wxCHECK_MSG(IsValidInsert(pos), -1, wxT("invalid index"));
- if (pos == GetCount())
+ if ((size_t)pos == GetCount())
return DoAppend(item);
wxXmString str( item.c_str() );