Fix code scanning alert no. 11: Multiplication result converted to la…

…rger type (#287)

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

cpp/third_party/zlib-1.2.13/zutil.c

@@ -310,7 +310,7 @@ voidpf ZLIB_INTERNAL zcalloc(opaque, items, size)
     unsigned size;
 {
     (void)opaque;
-    return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
+    return sizeof(uInt) > 2 ? (voidpf)malloc((size_t)items * size) :
                               (voidpf)calloc(items, size);
 }