master updated (246803f -> d2d3fc3)

[Alan Third]

athird pushed a change to branch master.

      from  246803f   Fix image crash on macOS (bug#49688)
       new  0b54632   * src/nsterm.m (ns_set_frame_alpha): Enable alpha on 
GNUstep.
       new  49bbed0   Simplify NS sizing and positioning code
       new  9ce3fdc   Fix NS inset rectangle corners
       new  d2d3fc3   Convert fringe bitmaps to vectors on NS port


Summary of changes:
 src/nsimage.m |  41 ---------
 src/nsterm.h  |   2 -
 src/nsterm.m  | 290 +++++++++++++++++++++++++++-------------------------------
 3 files changed, 135 insertions(+), 198 deletions(-)