Optimized away more includes, readded some #includes for necessary
prototypes.
diff --git a/msdos/dpmi.c b/msdos/dpmi.c
index 7ec8e2e..2ace8b7 100644
--- a/msdos/dpmi.c
+++ b/msdos/dpmi.c
@@ -6,23 +6,19 @@
#include <unistd.h>
#include <string.h>
-#include "windows.h"
-#include "heap.h"
-#include "global.h"
+#include "wintypes.h"
+#include "wine/winbase16.h"
#include "ldt.h"
+#include "global.h"
#include "module.h"
#include "miscemu.h"
-#include "drive.h"
#include "msdos.h"
#include "task.h"
-#include "dosexe.h"
#include "toolhelp.h"
-#include "debug.h"
#include "selectors.h"
-#include "thread.h"
#include "process.h"
-#include "stackframe.h"
#include "callback.h"
+#include "debug.h"
#define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())