* cygheap.cc (cygheap_dummy): Rename from cygheap_at_start.

(cygheap): Accommodate name change to cygheap_dummy.
(cygheap_init): Ditto.
(cygheap_fixup_in_child): Simplify slightly.
* fork.cc (fork): Add an advisory comment.

winsup/cygwin/fork.cc

@@ -601,6 +601,7 @@ extern "C" int
 fork ()
 {
   frok grouped;
+  /* No cygheap allocation beyond this point. */
 
   debug_printf ("entering");
   grouped.load_dlls = 0;