Fix initial window position on Windows.

The existing code, for some reason, would offset the initial window position by the
offset of the drawable part of the window within its frame. This makes little sense.
This was easy to see via ex_windows where the initial jump position + display window
positions were different by some value (e.g. [10, 33])

Author: SiegeLordEx

src/win/wwindow.c

@@ -203,9 +203,6 @@ HWND _al_win_create_window(ALLEGRO_DISPLAY *display, int width, int height, int
       width+lsize+rsize,
       height+tsize+bsize,
       SWP_NOZORDER | SWP_NOMOVE);
-   SetWindowPos(my_window, 0, pos_x-lsize, pos_y-tsize,
-      0, 0,
-      SWP_NOZORDER | SWP_NOSIZE);
 
    if (flags & ALLEGRO_FRAMELESS) {
       SetWindowLong(my_window, GWL_STYLE, WS_VISIBLE);