(lp#308961)
* bug fix: style warning during lambda-list introspection of generic
functions with both optional and key argments.
+ * bug fix: regalloc doesn't barf on unused TNs due to type-directed constant
+ folding. (lp#729765)
changes in sbcl-1.0.49 relative to sbcl-1.0.48:
* minor incompatible change: WITH-LOCKED-HASH-TABLE no longer disables