Issue #9611: remove useless and dangerous explicit conversion to size_t
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index a37efca..3b9fd05 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -5712,7 +5712,7 @@
         len = INT_MAX;
     size = write(fd, pbuf.buf, (int)len);
 #else
-    size = write(fd, pbuf.buf, (size_t)len);
+    size = write(fd, pbuf.buf, len);
 #endif
     Py_END_ALLOW_THREADS
     PyBuffer_Release(&pbuf);