Add genobject.c
diff --git a/PCbuild/pythoncore.vcproj b/PCbuild/pythoncore.vcproj
index dc2683a..5d5dbb9 100644
--- a/PCbuild/pythoncore.vcproj
+++ b/PCbuild/pythoncore.vcproj
@@ -993,6 +993,9 @@
 			</FileConfiguration>
 		</File>
 		<File
+			RelativePath="..\Objects\genobject.c">
+		</File>
+		<File
 			RelativePath="..\Python\getargs.c">
 			<FileConfiguration
 				Name="Release|Win32">