--- zlib-1.2.3/zutil.c.old	2005-06-13 09:37:49 +0900
+++ zlib-1.2.3/zutil.c	2008-04-17 00:46:05 +0900
@@ -303,7 +303,7 @@
     unsigned size;
 {
     if (opaque) items += size - size; /* make compiler happy */
-    return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
+    return sizeof(uInt) > 2 ? (voidpf)calloc(items, size) :
                               (voidpf)calloc(items, size);
 }