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/loader/task.c b/loader/task.c
index 0f0e0d4..3bb95ad 100644
--- a/loader/task.c
+++ b/loader/task.c
@@ -9,7 +9,7 @@
#include <assert.h>
#include <unistd.h>
-#include "windows.h"
+#include "wine/winbase16.h"
#include "user.h"
#include "callback.h"
#include "drive.h"
