### Godot version

v4.0.beta9.official [e780dc332]

### System information

macOS Ventura 13.0.1 (Intel), Radeon Pro 580 8 GB

### Issue description

When setting the size of a SubViewport (that is inside the corresponding SubViewportContainer) to zero, the editor crashes instantly.

**But it only happens when I set the size of the SubViewport by sliding the values.**

You can see what happens in this video:


https://user-images.githubusercontent.com/91340577/209363880-503d3dff-80e1-4e9e-bb57-d059fdbfeed0.mp4

At the end of the video you can see the crash message of macOS reading: _Godot quit unexpectedly._

If I write the number zero (or any negative) to the values of the SubViewport size, the crash doesn't happens.

### Steps to reproduce

1. Add a SubViewportContainer
2. Add a SubViewport as a child of the SubViewportContainer
3. Set the size of the SubViewport to zero **by sliding** the X or the Y value.

### Minimal reproduction project

1. Open the project
2. Go to the Control.tscn scene
3. Select the SubViewport node
4. Slide the X or Y values of the size to zero

[SubViewportCrash.zip](https://github.com/godotengine/godot/files/10296101/SubViewportCrash.zip)
}
					if (new_rect.position.x < 0) {
						new_rect.position.x = 0;
					}
					int title_height = gui.subwindow_focused->get_flag(Window::FLAG_BORDERLESS) ? 0 : gui.subwindow_focused->get_theme_constant(SNAME("title_height"));
					if (new_rect.position.y < title_height) {
						new_rect.position.y = title_height;
					}
				}
				gui.subwindow_focused->_rect_changed_callback(new_rect);
			}
			if (gui.subwindow_drag == SUB_WINDOW_DRAG_CLOSE) {
				gui.subwindow_drag_close_inside = gui.subwindow_drag_close_rect.has_point(mm->get_position());
			}
			if (gui.subwindow_drag == SUB_WINDOW_DRAG_RESIZE) {
				Vector2i diff = mm->get_position() - gui.subwindow_drag_from;
				Size2i min_size = gui.subwindow_focused->get_min_size();
				Size2i min_size_clamped = gui.subwindow_focused->get_clamped_minimum_size();
				min_size_clamped.x = MAX(min_size_clamped.x, 1);
				min_size_clamped.y = MAX(min_size_clamped.y, 1);
				Rect2i r = gui.subwindow_resize_from_rect;
				Size2i limit = r.size - min_size_clamped;
				switch (gui.subwindow_resize_mode) {
					case SUB_WINDOW_RESIZE_TOP_LEFT: {
						diff.x = MIN(diff.x, limit.x);
						diff.y = MIN(diff.y, limit.y);
						r.position += diff;
						r.size -= diff;
					} break;
					case SUB_WINDOW_RESIZE_TOP: {