PVS-Studio warning V572 for wxWidgets

class wxFontMapper : public wxFontMapperBase
{
  ...
}

wxFontMapper *wxConsoleAppTraitsBase::CreateFontMapper()
{
  return (wxFontMapper *)new wxFontMapperBase;
}

This suspicious code was found in wxWidgets project by PVS-Studio static code analyzer.
Warning message is:
V572 It is odd that the object which was created using 'new' operator is immediately casted to another type. base appbase.cpp 812

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/