Fix bug #14771 with scroll-step = 1 and non-nil line-spacing.

 src/xdisp.c (default_line_pixel_height): New function.
 (pos_visible_p, move_it_vertically_backward, try_scrolling)
 (try_cursor_movement, redisplay_window, try_window)
 (try_window_id): Use it instead of FRAME_LINE_HEIGHT.  (Bug#14771)
 src/window.c (window_scroll_pixel_based): use
 default_line_pixel_height.
 src/dispextern.h (default_line_pixel_height): Add prototype.
 src/frame.c (x_set_line_spacing): Accept a float value for
 line-spacing parameter, per the documentation.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 83d66ee6de6..9bf1840baac 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,18 @@
 2013-07-06  Eli Zaretskii  <eliz@gnu.org>
 
+        * xdisp.c (default_line_pixel_height): New function.
+        (pos_visible_p, move_it_vertically_backward, try_scrolling)
+        (try_cursor_movement, redisplay_window, try_window)
+        (try_window_id): Use it instead of FRAME_LINE_HEIGHT.  (Bug#14771)
+
+        * window.c (window_scroll_pixel_based): use
+        default_line_pixel_height.
+
+        * dispextern.h (default_line_pixel_height): Add prototype.
+
+        * frame.c (x_set_line_spacing): Accept a float value for
+        line-spacing parameter, per the documentation.
+
         * data.c (Fmultibyte_string_p): Doc fix.
 
 2013-07-05  Paul Eggert  <eggert@cs.ucla.edu>