add in a memory limit fix patch

pointed out by heko@iki.fi

www/php4/patches/patch-Zend_zend_alloc_c

@@ -0,0 +1,13 @@
+$OpenBSD: patch-Zend_zend_alloc_c,v 1.1 2001/08/11 00:16:56 avsm Exp $
+--- Zend/zend_alloc.c.orig	Tue Jun 19 18:04:53 2001
++++ Zend/zend_alloc.c	Sat Aug 11 00:07:15 2001
+@@ -446,6 +446,9 @@ ZEND_API void shutdown_memory_manager(in
+ 		for (i=1; i<MAX_CACHED_MEMORY; i++) {
+ 			for (j=0; j<AG(cache_count)[i]; j++) {
+ 				ptr = (zend_mem_header *) AG(cache)[i][j];
++#if MEMORY_LIMIT
++				AG(allocated_memory) -= REAL_SIZE(ptr->size);
++#endif
+ 				REMOVE_POINTER_FROM_LIST(ptr);
+ 				free(ptr);
+ 			}