change to the DEFSTRUCT-DESCRIPTION structure, and again because
of the new implementation of DEFINE-COMPILER-MACRO.
+changes in sbcl-0.7.12 relative to sbcl-0.7.11:
+ * fixed bug 62: constraints were not propagated into a loop.
+
planned incompatible changes in 0.7.x:
* (not done yet, but planned:) When the profiling interface settles
down, maybe in 0.7.x, maybe later, it might impact TRACE. They both