Retrospective commit from 2009-10-24.

Retrospective commit from 2009-10-24.

Continue working on set_cursor_from_row.
Cleanup of resolved_level and bidi_type members of struct glyph.

 xdisp.c (set_cursor_from_row): Fix off-by-one error when
 skipping over non-character glyphs at end of a reversed row.

 dispextern.h (struct glyph): The `resolved_level' member needs
 only 5 bits, not 6.  The `bidi_type' member needs only 3 bits.
 (bidi_type_t): Rearrange so that types that can appear in the
 resolved type are at the beginning and have values less than 8.

 bidi.c: Include setjmp.h.