There's a slight mistake in the function "GetWindowStyle" found in file "SDL_windowswindow.c".

When a window is marked to be resizable, the resizable style is being added regardless of whether the window has a border or not. While for some arcane, hidden semantics this can be ok, it's still inconsistent in this case.

CURRENT:

    if (window->flags & SDL_WINDOW_FULLSCREEN) {
        style |= STYLE_FULLSCREEN;
    } else {
        if (window->flags & SDL_WINDOW_BORDERLESS) {
            style |= STYLE_BORDERLESS;
        } else {
            style |= STYLE_NORMAL;
        }
        if (window->flags & SDL_WINDOW_RESIZABLE) {
            style |= STYLE_RESIZABLE;
        }
    }


CHANGE: (move resizable check into other scope)

    if (window->flags & SDL_WINDOW_FULLSCREEN) {
        style |= STYLE_FULLSCREEN;
    } else {
        if (window->flags & SDL_WINDOW_BORDERLESS) {
            style |= STYLE_BORDERLESS;
        } else {
            style |= STYLE_NORMAL;
            if (window->flags & SDL_WINDOW_RESIZABLE) {
                style |= STYLE_RESIZABLE;
            }
        }
    }