GCC 14 fixes.

--- ghostscript-10.02.1/psi/interp.c
+++ ghostscript-10.02.1/psi/interp.c
@@ -13,6 +13,7 @@
    CA 94129, USA, for further information.
 */
 
+#include <assert.h>
 
 /* Ghostscript language interpreter */
 #include "memory_.h"