Fix bug #9149 with mouse highlight of empty lines.

 src/xdisp.c (rows_from_pos_range): Don't ignore glyphs whose object
 is an integer, which is important for empty lines.

src/ChangeLog

+2011-07-22  Eli Zaretskii  <eliz@gnu.org>
+
+	* xdisp.c (rows_from_pos_range): Don't ignore glyphs whose object
+	is an integer, which is important for empty lines.  (Bug#9149)
+
 2011-07-22  Chong Yidong  <cyd@stupidchicken.com>
 
 	* frame.c (Fmodify_frame_parameters): In tty case, update the

src/xdisp.c

@@ -25029,7 +25029,7 @@ rows_from_pos_range (struct window *w,
 	  while (g < e)
 	    {
-	      if (BUFFERP (g->object)
+	      if ((BUFFERP (g->object) || INTEGERP (g->object))
 		  && start_charpos <= g->charpos && g->charpos < end_charpos)
 		*start = row;
 	      g++;
@@ -25079,7 +25079,7 @@ rows_from_pos_range (struct window *w,
 	  while (g < e)
 	    {
-	      if (BUFFERP (g->object)
+	      if ((BUFFERP (g->object) || INTEGERP (g->object))
 		  && start_charpos <= g->charpos && g->charpos < end_charpos)
 		break;
 	      g++;