Taught the Windows build about _randommodule.c. This is compiled
into the core DLL, since it's not much code and lots of stuff uses
it (e.g., try getting a tempfile name without it).
diff --git a/PCbuild/pythoncore.dsp b/PCbuild/pythoncore.dsp
index c6a13b2..5e98a7c 100644
--- a/PCbuild/pythoncore.dsp
+++ b/PCbuild/pythoncore.dsp
@@ -105,6 +105,10 @@
# End Source File
# Begin Source File
+SOURCE=..\Modules\_randommodule.c
+# End Source File
+# Begin Source File
+
SOURCE=..\Modules\_weakref.c
# End Source File
# Begin Source File