innobase/fsp/fsp0fsp.c:
  Declare "first" in the scope where it is used, and add dummy return
  statement after ut_error to silence compiler warning.
innobase/include/dyn0dyn.h:
  Add const qualifier to dyn_push_string().
innobase/include/dyn0dyn.ic:
  dyn_push_string(): Add const qualifier to str;
  remove intermediate assignment.
innobase/include/mtr0log.h:
  mlog_write_string(), mlog_catenate_string(): Add const to str
innobase/log/log0log.c:
  Eliminate variables new_oldest and do_preflush in order to avoid
  warnings about possibly uninitialized variables.
  (new_oldest will now be declared in the scope of usage,
  and do_preflush == (advance != 0).)
innobase/log/log0recv.c:
  Remove warnings about uninitialized variables.
  Add UNIV_UNLIKELY() hints.
innobase/mtr/mtr0log.c:
  mlog_write_string(), mlog_catenate_string(): Add const to str
  mlog_write_string(): Add UNIV_UNLIKELY hints to assertion-like tests
innobase/row/row0sel.c:
  Remove warning about possibly uninitialized variable.
  (Always initialize *out_rec.)