(adjust_glyph_matrix): Don't try to reuse the current

matrix of a window when the header line changes, when
new rows are allocated, or when the width changes.

src/ChangeLog

+2001-03-30  Gerd Moellmann  <gerd@gnu.org>
+
+	* dispnew.c (adjust_glyph_matrix): Don't try to reuse the current
+	matrix of a window when the header line changes, when
+	new rows are allocated, or when the width changes.
+
 2001-03-30  Eli Zaretskii  <eliz@is.elta.co.il>
 
 	* print.c (Fprin1, Fprin1_to_string, Fprinc, Fprint): Fix last

src/dispnew.c

@@ -790,9 +790,12 @@ adjust_glyph_matrix (w, matrix, x, y, dim)
 	     upper window).  Invalidate all rows that are no longer part
 	     of the window.  */
 	  if (!marginal_areas_changed_p
+	      && !header_line_changed_p
+	      && new_rows == 0
+	      && dim.width == matrix->matrix_w
 	      && matrix->window_left_x == XFASTINT (w->left)
 	      && matrix->window_top_y == XFASTINT (w->top)
-	      && matrix->window_width == window_box_width (w, -1))
+	      && matrix->window_width == window_width)
 	    {
 	      i = 0;
 	      while (matrix->rows[i].enabled_p