Teach pythoncore project about new pystrtod.c for VC7.1.  This was done
a long time ago for VC6.
diff --git a/PCbuild/pythoncore.vcproj b/PCbuild/pythoncore.vcproj
index b15b900..e7673d1 100644
--- a/PCbuild/pythoncore.vcproj
+++ b/PCbuild/pythoncore.vcproj
@@ -1834,6 +1834,9 @@
 			</FileConfiguration>
 		</File>
 		<File
+			RelativePath="..\Python\pystrtod.c">
+		</File>
+		<File
 			RelativePath="..\PC\python_nt.rc">
 			<FileConfiguration
 				Name="Release|Win32">