The Windows RNG turns out to only give about 16 bits at a time. This

is (a) pretty feeble, and (b) means that although Net seeds transfer
between platforms and still generate the same game, there's a
suspicious discrepancy in the typical seed _generated_ by each
platform.
I have a better RNG kicking around in this code base already, so
I'll just use it. Each midend has its own random_state, which it
passes to new_game_seed() as required. A handy consequence of this
is that initial seed data is now passed to midend_new(), which means
that new platform implementors are unlikely to forget to seed the
RNG because failure to do so causes a compile error!

[originally from svn r4187]

Recipe

@@ -13,8 +13,8 @@
 !makefile cygwin Makefile.cyg
 
 WINDOWS  = windows user32.lib gdi32.lib comctl32.lib
-COMMON   = midend misc malloc
-NET      = net random tree234
+COMMON   = midend misc malloc random
+NET      = net tree234
 
 net      : [X] gtk COMMON NET
 cube     : [X] gtk COMMON cube