single-floats on 64-bit platforms where single-floats are not boxed.
* bug fix: SB-MOP:CLASS-SLOTS now signals an error if the class has not
yet been finalized. (reported by Levente Meszaros)
+ * bug fix: CLOSE :ABORT T behaves more correctly on Windows.
* DESCRIBE and (DOCUMENTATION ... 'OPTIMIZE) describe meaning of
SBCL-specific optimize qualities.