master updated (17c1981 -> ac7b260)

[Philipp Stephani]

phst pushed a change to branch master.

      from  17c1981   Further expand coverage of unit tests for time-stamp
       new  00c9949   Remove some undefined behavior related to left shifts.
       new  ac7b260   * src/pdumper.c (Fdump_emacs_portable): Reword error 
message.


Summary of changes:
 src/macfont.m |  3 ++-
 src/nsfns.m   | 10 ++++++++--
 src/nsimage.m |  7 ++++---
 src/nsterm.m  | 12 ++++++++----
 src/pdumper.c |  4 +++-
 5 files changed, 25 insertions(+), 11 deletions(-)