Bump Windows build number for 2.3b1.
diff --git a/PCbuild/pythoncore.dsp b/PCbuild/pythoncore.dsp
index c227650..053d8b5 100644
--- a/PCbuild/pythoncore.dsp
+++ b/PCbuild/pythoncore.dsp
@@ -258,7 +258,7 @@
 # Begin Source File

 

 SOURCE=..\Modules\getbuildinfo.c

-# ADD CPP /D BUILD=39

+# ADD CPP /D BUILD=40

 # End Source File

 # Begin Source File