- TLB_LoadTypeLib: ref count problem.
- ITypeLib::GetTypeInfoOfGuid: safer implementation (pointer testing).
- ITypeInfo::GetRefTypeOfImplType: safer implementation (pointer testing).
- ITypeInfo2::GetDocumentationL return errors if SysAllocString failed.
- TLB loader functions now trace in "typelib" channel.
- Improved traces in AddRef/Release and improved dump_* functions for
  debugging.