Make mappings unlimited on NT

This change might also fix fork() in certain cases on NT.

examples/defer-statements.c

@@ -0,0 +1,24 @@
+#if 0
+/*─────────────────────────────────────────────────────────────────╗
+│ To the extent possible under law, Justine Tunney has waived      │
+│ all copyright and related or neighboring rights to this file,    │
+│ as it is written in the following disclaimers:                   │
+│   • http://unlicense.org/                                        │
+│   • http://creativecommons.org/publicdomain/zero/1.0/            │
+╚─────────────────────────────────────────────────────────────────*/
+#endif
+#include "libc/mem/mem.h"
+#include "libc/runtime/gc.h"
+#include "libc/stdio/stdio.h"
+
+/**
+ * Cosmopolitan C is just as awesome as Go!
+ * Example contributed by @Keithcat1 (#266)
+ */
+main() {
+  _defer(printf, "Done!\n");
+  for (long i = 0; i < 100000; i++) {
+    printf("%i ", i);
+    _defer(free, malloc(100));  // longhand for _gc(malloc(100))
+  }
+}