1.0.13.46: fixed bug #402

1.0.13.46: fixed bug #402

 * Rewrite SPLIT-DECLARATIONS to use two (short) constant lists and
   INFO instead of *VAR-DECLARATIONS-WITH|WITHOUT-ARG*.

 * Test-case for #402.

 * While at it, replace the *VAR-DECLARATIONS* from walker as well,
   replacing it with WALKED-VAR-DECLARATION-P, and make VAR-DECLARATION
   use a compiler-macro to check for bogus-declarations when possible.
   (All our whopping 3 calls to it.)

 * Bug #413 was fixed in 1.0.13, remove it from BUGS.

 * Whitespace.