is_base_and_derived: no workaround needed fo SunPro CC 5.5

[nobody]

boost/type_traits/is_base_and_derived.hpp, line 27

27 :  && !BOOST_WORKAROUND(__SUNPRO_CC , 
BOOST_TESTED_AT(0x540)) \ 

probably should be changed to

27 :  && !BOOST_WORKAROUND(__SUNPRO_CC , <= 0x540)) \ 

since with SunPro compiler v.5.5 it works fine
(the exact compiler verion I checked is: Sun C++ 5.5 
Patch 113817-09 2004/08/03)

The broken is_base_and_derived version fails to detect 
private inheritance which in turn prevents from using 
such libraries as multi_index.

[John Maddock]

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user_id=14804

Thanks, will apply, John.