[vtkusers] Make Error

[Darshan Pai]

I tried to compile vtk 4.2 on Solaris 9 .
Every thing was running good until it encountered an error trying to
compile vtkBMPREADER.o

this is the error 
 /export/home/../VTK/IO/vtkBMPReader.cxx:569:   instantiated from here
/export/home/../VTK/IO/vtkBMPReader.cxx:511: error: ISO C++ says that
these are ambiguous, even though the worst conversion for the first is
better than the worst conversion for the second:


ANy help appreciated