gh-107279 Add `<stddef.h>` to `Modules/zlibmodule.c` to fix failing builds (#107280)

diff --git a/Modules/zlibmodule.c b/Modules/zlibmodule.c
index 22da50989a88dcc154811699e48a3f72def14e5c..a98a37adadcff0292bf4f9055f19de0d579a14fd 100644 (file)
--- a/Modules/zlibmodule.c
+++ b/Modules/zlibmodule.c
@@ -7,6 +7,7 @@
 
 #include "zlib.h"
 #include "stdbool.h"
+#include <stddef.h>               // offsetof()
 
 #if defined(ZLIB_VERNUM) && ZLIB_VERNUM < 0x1221
 #error "At least zlib version 1.2.2.1 is required"