Change the length of the u32arr 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-u32s$a (stobjs::i u32arr$a) (declare (xargs :guard (u32arr$ap u32arr$a))) (resize-list u32arr$a stobjs::i '0))