Merge pull request #40217 from theoway/visible_line_count_fix

Fixes the get_visible_line_count() of rich text label

scene/gui/rich_text_label.cpp

@@ -1020,7 +1020,8 @@ void RichTextLabel::_notification(int p_what) {
 
 			visible_line_count = 0;
 			while (y < size.height && from_line < main->lines.size()) {
-				visible_line_count += _process_line(main, text_rect.get_position(), y, text_rect.get_size().width - scroll_w, from_line, PROCESS_DRAW, base_font, base_color, font_color_shadow, use_outline, shadow_ofs, Point2i(), nullptr, nullptr, nullptr, total_chars);
+				visible_line_count++;
+				_process_line(main, text_rect.get_position(), y, text_rect.get_size().width - scroll_w, from_line, PROCESS_DRAW, base_font, base_color, font_color_shadow, use_outline, shadow_ofs, Point2i(), nullptr, nullptr, nullptr, total_chars);
 				total_chars += main->lines[from_line].char_count;
 
 				from_line++;