Fix bug #10164 with assertion violations in linum-mode.

 src/dispnew.c (adjust_glyph_matrix) [XASSERTS]: Ensure ROW's
 attributes are tested _before_ calling verify_row_hash, to protect
 against GCC re-ordering of the tests.

src/ChangeLog

+2011-11-30  Eli Zaretskii  <eliz@gnu.org>
+
+	* dispnew.c (adjust_glyph_matrix) [XASSERTS]: Ensure ROW's
+	attributes are tested _before_ calling verify_row_hash, to protect
+	against GCC re-ordering of the tests.  (Bug#10164)
+
 2011-11-29  Jan Djärv  <jan.h.d@swipnet.se>
 
 	* xterm.h (struct x_output): net_wm_state_hidden_seen is new.

src/dispnew.c

@@ -608,9 +608,10 @@ adjust_glyph_matrix (struct window *w, struct glyph_matrix *matrix, int x, int y
 		  row->glyphs[LAST_AREA]
 		    = row->glyphs[LEFT_MARGIN_AREA] + dim.width;
 		}
-	      xassert (!row->enabled_p
-		       || row->mode_line_p
-		       || verify_row_hash (row));
+#if XASSERTS
+	      if (row->enabled_p && !row->mode_line_p)
+		verify_row_hash (row));
+#endif
 	      ++row;
 	    }
 	}