Make the vpc actually build a project

libtcmalloc_minimal.so from cstrike linux

src/engine/engine.vpc

@@ -902,7 +902,7 @@ $Project "engine"
 		$File	"$SRCDIR\public\vgui\Dar.h"
 		$File	"$SRCDIR\public\datamap.h"
 		$File	"$SRCDIR\public\tier0\dbg.h"
-		$File	"$SRCDIR\dx9sdk\include\dinput.h"
+		$File	"$SRCDIR\dx9sdk\include\dinput.h" [$WINDOWS]
 		$File	"$SRCDIR\public\disp_vertindex.h"
 		$File	"$SRCDIR\public\dlight.h"
 		$File	"$SRCDIR\public\dt_utlvector_recv.h"