Fix test_set_memlimit() on 32-bit Windows

Author: vstinner

Lib/test/test_support.py

@@ -708,15 +708,19 @@ def test_set_memlimit(self):
         old_max_memuse = support.max_memuse
         old_real_max_memuse = support.real_max_memuse
         try:
-            support.set_memlimit('4g')
-            self.assertEqual(support.max_memuse, _4GiB)
-            self.assertEqual(support.real_max_memuse, _4GiB)
-
             if sys.maxsize > 2**32:
+                support.set_memlimit('4g')
+                self.assertEqual(support.max_memuse, _4GiB)
+                self.assertEqual(support.real_max_memuse, _4GiB)
+
                 big = 2**100 // TiB
                 support.set_memlimit(f'{big}t')
                 self.assertEqual(support.max_memuse, sys.maxsize)
                 self.assertEqual(support.real_max_memuse, big * TiB)
+            else:
+                support.set_memlimit('4g')
+                self.assertEqual(support.max_memuse, sys.maxsize)
+                self.assertEqual(support.real_max_memuse, _4GiB)
         finally:
             support.max_memuse = old_max_memuse
             support.real_max_memuse = old_real_max_memuse