Fix text clipping in Tree items not working with negative values

scene/gui/tree.cpp

@@ -1121,7 +1121,7 @@ void Tree::draw_item_rect(const TreeItem::Cell &p_cell, const Rect2i &p_rect, co
 	}
 
 	rect.position.y += Math::floor((rect.size.y - font->get_height()) / 2.0) + font->get_ascent();
-	font->draw(ci, rect.position, text, p_color, rect.size.x);
+	font->draw(ci, rect.position, text, p_color, MAX(0, rect.size.width));
 }
 
 int Tree::draw_item(const Point2i &p_pos, const Point2 &p_draw_ofs, const Size2 &p_draw_size, TreeItem *p_item) {