Fix broken MSVC 2008 project file

--- cdr/build/win32/libcdr.vcproj	2013-05-30 17:36:43.084800000 +0200
+++ cdr/build/win32/libcdr.vcproj	2013-05-30 17:36:52.710000000 +0200
@@ -217,7 +217,7 @@
 				</FileConfiguration>
 			</File>
 			<File
-				RelativePath="..\..\inc\libcdr\CDRDocument.cpp"
+				RelativePath="..\..\src\lib\CDRDocument.cpp"
 				>
 				<FileConfiguration
 					Name="Debug|Win32"
