+- wxFile methods now return wxFileOffset which may be a 64 bit integer type,
+ even on 32 bit platforms, instead of off_t and so the return value of
+ wxFile::Length(), for example, shouldn't be assigned to off_t variable any
+ more (the compiler might warn you about this).
+- wxListItem::m_data is now of type wxUIntPtr, not long, for compatibility
+ with 64 bit systems