client/mysqltest.c:
  warnings
extra/comp_err.c:
  warnings
sql/event_queue.cc:
  warnings
sql/handler.h:
  warnings
sql/opt_range.cc:
  warnings
sql/opt_range.h:
  warnings
sql/rpl_mi.cc:
  warnings
sql/sql_class.cc:
  wl#2936 post-merge fixes, warnings