[boost] [conversion] Borland cast_test failure

From: AlisdairM (alisdair.meredith_at_[hidden])
Date: 2005-06-26 07:04:10

The reason for the failure is simple - Borland compiler cannot handle
default template parameters for nested templates.

I could not find a quick workaround, so suggest marking this test as
'expected fail' unless there is some codefrom an older version for it
to fall back on.

-- 
AlisdairM