include: Use LONG in vfw.h for Win64 compatibility.
diff --git a/include/vfw.h b/include/vfw.h
index b3b6679..2751ef5 100644
--- a/include/vfw.h
+++ b/include/vfw.h
@@ -1419,7 +1419,7 @@
#define MCIWndGetLength(hWnd) (LONG)MCIWndSM(hWnd,MCIWNDM_GETLENGTH,0,0)
#define MCIWndGetEnd(hWnd) (LONG)MCIWndSM(hWnd,MCIWNDM_GETEND,0,0)
-#define MCIWndStep(hWnd,n) (LONG)MCIWndSM(hWnd,MCI_STEP,0,(LPARAM)(long)(n))
+#define MCIWndStep(hWnd,n) (LONG)MCIWndSM(hWnd,MCI_STEP,0,(LPARAM)(LONG)(n))
#define MCIWndDestroy(hWnd) (VOID)MCIWndSM(hWnd,WM_CLOSE,0,0)
#define MCIWndSetZoom(hWnd,iZoom) (VOID)MCIWndSM(hWnd,MCIWNDM_SETZOOM,0,(LPARAM)(UINT)(iZoom))