[Bug c++/96570] Warnings desired for time_t to/from int coversions

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96570

--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
More catched cases:

  t = sb[0]|(sb[1]|(sb[2]|sb[3]<<8)<<8)<<8; // warn - from
mdadm-4.5+44.gf732de3f mdadm/util.c
  t = sb[0]|(sb[1]|(sb[2]|(unsigned)sb[3]<<8)<<8)<<8; // OK until 2106
  t = u8<<24; // warn - from boost_1_91_0/libs/iostreams/src/gzip.cpp
  t = (unsigned)u8<<24; // OK until 2106