Fix another crash due to incorrect hash value of glyph rows, bug #10035.

 src/dispnew.c (swap_glyph_pointers): Swap the used[] arrays and the
 hash values of the two rows.
 (copy_row_except_pointers): Preserve the used[] arrays and the
 hash values of the two rows.
 src/xdisp.c (row_hash): New function, body extracted from
 compute_line_metrics.
 (compute_line_metrics): Call row_hash, instead of computing the
 hash code inline.
 src/dispnew.c (verify_row_hash): Call row_hash for computing the
 hash code of a row, instead of duplicating code from xdisp.c.
 src/dispextern.h (row_hash): Add prototype.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 81f7fbbdc29..b394c37354f 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,20 @@
+2011-11-18  Eli Zaretskii  <eliz@gnu.org>
+
+        * dispnew.c (swap_glyph_pointers): Swap the used[] arrays and the
+        hash values of the two rows.
+        (copy_row_except_pointers): Preserve the used[] arrays and the
+        hash values of the two rows.  (Bug#10035)
+
+        * xdisp.c (row_hash): New function, body extracted from
+        compute_line_metrics.
+        (compute_line_metrics): Call row_hash, instead of computing the
+        hash code inline.
+
+        * dispnew.c (verify_row_hash): Call row_hash for computing the
+        hash code of a row, instead of duplicating code from xdisp.c.
+
+        * dispextern.h (row_hash): Add prototype.
+
 2011-11-18  Tassilo Horn  <tassilo@member.fsf.org>
 
         * frame.c (delete_frame): Don't delete the terminal when the last