Draw the script editor's line length guideline below characters

This prevents characters from looking strange if they cross the
line length guideline.

scene/gui/text_edit.cpp

@@ -681,6 +681,13 @@ void TextEdit::_notification(int p_what) {
 				}
 			}
 
+			if (line_length_guideline) {
+				int x = xmargin_beg + cache.font->get_char_size('0').width * line_length_guideline_col - cursor.x_ofs;
+				if (x > xmargin_beg && x < xmargin_end) {
+					VisualServer::get_singleton()->canvas_item_add_line(ci, Point2(x, 0), Point2(x, size.height), cache.line_length_guideline_color);
+				}
+			}
+
 			int brace_open_match_line = -1;
 			int brace_open_match_column = -1;
 			bool brace_open_matching = false;
@@ -1339,13 +1346,6 @@ void TextEdit::_notification(int p_what) {
 				}
 			}
 
-			if (line_length_guideline) {
-				int x = xmargin_beg + cache.font->get_char_size('0').width * line_length_guideline_col - cursor.x_ofs;
-				if (x > xmargin_beg && x < xmargin_end) {
-					VisualServer::get_singleton()->canvas_item_add_line(ci, Point2(x, 0), Point2(x, size.height), cache.line_length_guideline_color);
-				}
-			}
-
 			bool completion_below = false;
 			if (completion_active) {
 				// code completion box