Fixed compile error on windows.
diff --git a/PC/VC6/pythoncore.dsp b/PC/VC6/pythoncore.dsp
index 756e271..38d450b 100644
--- a/PC/VC6/pythoncore.dsp
+++ b/PC/VC6/pythoncore.dsp
@@ -519,6 +519,10 @@
 # End Source File

 # Begin Source File

 

+SOURCE=..\..\Objects\memoryobject.c

+# End Source File

+# Begin Source File

+

 SOURCE=..\..\Parser\metagrammar.c

 # End Source File

 # Begin Source File

diff --git a/PC/VS7.1/pythoncore.vcproj b/PC/VS7.1/pythoncore.vcproj
index 601bfa0..672db12 100644
--- a/PC/VS7.1/pythoncore.vcproj
+++ b/PC/VS7.1/pythoncore.vcproj
@@ -659,6 +659,9 @@
 			RelativePath="..\..\Modules\md5module.c">
 		</File>
 		<File
+			RelativePath="..\..\Objects\memoryobject.c">
+		</File>
+		<File
 			RelativePath="..\..\Parser\metagrammar.c">
 		</File>
 		<File
diff --git a/PC/VS8.0/pythoncore.vcproj b/PC/VS8.0/pythoncore.vcproj
index d1be268..e0a5337 100644
--- a/PC/VS8.0/pythoncore.vcproj
+++ b/PC/VS8.0/pythoncore.vcproj
@@ -1459,6 +1459,10 @@
 				>
 			</File>
 			<File
+				RelativePath="..\..\Objects\memoryobject.c"
+				>
+			</File>
+			<File
 				RelativePath="..\..\Objects\methodobject.c"
 				>
 			</File>
diff --git a/PCbuild/pythoncore.vcproj b/PCbuild/pythoncore.vcproj
index 0d3d71e..1b9056a 100644
--- a/PCbuild/pythoncore.vcproj
+++ b/PCbuild/pythoncore.vcproj
@@ -1459,6 +1459,10 @@
 				>
 			</File>
 			<File
+				RelativePath="..\Objects\memoryobject.c"
+				>
+			</File>
+			<File
 				RelativePath="..\Objects\methodobject.c"
 				>
 			</File>