[pango] Fix is_char_break issue in pango_default_break function

[Michael Catanzaro <mcatanzaro src gnome org>]

commit e8316c1c6f46b844b265478622d3a581305b70b6
Author: Peng Wu <alexepico gmail com>
Date:   Tue Oct 31 13:07:02 2017 +0800

    Fix is_char_break issue in pango_default_break function
    
    For most cases, the is_char_break variable should be TRUE.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=789625

 pango/break.c |   10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)
---
diff --git a/pango/break.c b/pango/break.c
index c46f338..2e66972 100644
--- a/pango/break.c
+++ b/pango/break.c
@@ -1159,11 +1159,10 @@ pango_default_break (const gchar   *text,
            }
 
          attrs[i].is_line_break = TRUE; /* Rule LB31 */
-         /* Unicode doesn't specify char wrap; we wrap around all chars
-          * except where a line break is prohibited, which means we
-          * effectively break everywhere except inside runs of spaces.
-          */
-         attrs[i].is_char_break = TRUE;
+         /* Unicode doesn't specify char wrap;
+            we wrap around all chars currently. */
+         if (attrs[i].is_cursor_position)
+           attrs[i].is_char_break = TRUE;
 
          /* Make any necessary replacements first */
          if (row_break_type == G_UNICODE_BREAK_UNKNOWN)
@@ -1458,7 +1457,6 @@ pango_default_break (const gchar   *text,
            {
            case BREAK_PROHIBITED:
              /* can't break here */
-             attrs[i].is_char_break = FALSE;
              attrs[i].is_line_break = FALSE;
              break;