* dispnew.c: Integer signedness and overflow fixes.

Remove unnecessary forward decls, that were a maintenance hassle.
(history_tick): Now uprintmax_t, so it's more likely to avoid overflow.
All uses changed.
(adjust_glyph_matrix, realloc_glyph_pool, adjust_frame_message_buffer)
(scrolling_window): Use ptrdiff_t, not int, for byte count.
(prepare_desired_row, line_draw_cost):
Use int, not unsigned, where either works.
(save_current_matrix, restore_current_matrix):
Use ptrdiff_t, not size_t, where either works.
(init_display): Check for overflow more accurately, and without
relying on undefined behavior.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 62bf5712621..e2cf24fc173 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,18 @@
 2011-07-07  Paul Eggert  <eggert@cs.ucla.edu>
 
+        * dispnew.c: Integer signedness and overflow fixes.
+        Remove unnecessary forward decls, that were a maintenance hassle.
+        (history_tick): Now uprintmax_t, so it's more likely to avoid overflow.
+        All uses changed.
+        (adjust_glyph_matrix, realloc_glyph_pool, adjust_frame_message_buffer)
+        (scrolling_window): Use ptrdiff_t, not int, for byte count.
+        (prepare_desired_row, line_draw_cost):
+        Use int, not unsigned, where either works.
+        (save_current_matrix, restore_current_matrix):
+        Use ptrdiff_t, not size_t, where either works.
+        (init_display): Check for overflow more accurately, and without
+        relying on undefined behavior.
+
         * editfns.c (pWIDE, pWIDElen, signed_wide, unsigned_wide):
         Remove, replacing with the new symbols in lisp.h.  All uses changed.
         * fileio.c (make_temp_name):