Change the length of the litarr array.
In the execution this resizes (to grow or shrink) the underlying Common Lisp array. The logical definition is based on resize-list:
Function:
(defun resize-lits$a (stobjs::i litarr$a) (declare (xargs :guard (litarr$ap litarr$a))) (resize-list litarr$a stobjs::i '0))