Moved potential inclusion of system's malloc.h and memory.h header files to

setup_once.h.  Inclusion of each header file is based on the definition of
NEED_MALLOC_H and NEED_MEMORY_H respectively.

packages/vms/config-vms.h

@@ -256,6 +256,9 @@
 /* Define if you have the <memory.h> header file. */
 #define HAVE_MEMORY_H   1
 
+/* Define to 1 if you need the memory.h header file even with stdlib.h */
+#define NEED_MEMORY_H 1
+
 /* Define if you have the `sigsetjmp' function. */
 #define HAVE_SIGSETJMP 1