Moved all Win16 definitions out of the standard Windows headers.

diff --git a/windows/x11drv/event.c b/windows/x11drv/event.c
index 6b68235..76afbda 100644
--- a/windows/x11drv/event.c
+++ b/windows/x11drv/event.c
@@ -1525,8 +1525,8 @@
   }		u;
   int			x, y;
   BOOL16	        bAccept;
-  HGLOBAL16		hDragInfo = GlobalAlloc16( GMEM_SHARE | GMEM_ZEROINIT, sizeof(DRAGINFO));
-  LPDRAGINFO            lpDragInfo = (LPDRAGINFO) GlobalLock16(hDragInfo);
+  HGLOBAL16		hDragInfo = GlobalAlloc16( GMEM_SHARE | GMEM_ZEROINIT, sizeof(DRAGINFO16));
+  LPDRAGINFO16          lpDragInfo = (LPDRAGINFO16) GlobalLock16(hDragInfo);
   SEGPTR		spDragInfo = (SEGPTR) WIN16_GlobalLock16(hDragInfo);
   Window		w_aux_root, w_aux_child;
   WND*			pDropWnd;