Optimized include/*.h: (recursively) include all headers needed by
this .h file, but only those. Necessary fixes to a lot of .c files,
started optimizing "windows.h" away from some of them. Moved
GetCurrentTask prototype to wine/winbase16.h.
diff --git a/files/dos_fs.c b/files/dos_fs.c
index 22c0ed2..baf5566 100644
--- a/files/dos_fs.c
+++ b/files/dos_fs.c
@@ -19,7 +19,9 @@
#include <time.h>
#include <unistd.h>
-#include "windows.h"
+#include "windef.h"
+#include "winuser.h"
+#include "wine/winbase16.h"
#include "winerror.h"
#include "drive.h"
#include "file.h"
