add assertEquals(int,unsigned short) overload to resolve the ambiguity resulting...

add assertEquals(int,unsigned short) overload to resolve the ambiguity resulting in tests comparing unsigned short with literal integer constants now that we have both assertEqals(int,unsigned int) and assertEquals(int, unsigned long) to satisfy VC6

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56635 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775