include/my_global.h:
  Safer macros to avoid possible overflows
sql/item_cmpfunc.cc:
  Simple optimization
sql/sp_head.cc:
  Indentation fixes
  Remove not needed "else" levels
  Added error checking for 'new'
  Simpler reseting of thd->spcont in execute_procedure
sql/sql_base.cc:
  Faster new
sql/sql_lex.cc:
  Use 'TRUE' instead of 'true'
sql/sql_parse.cc:
  Faster new
sql/sql_view.cc:
  No need to set 'tables' as it's not used
sql/table.cc:
  Simpler DBUG_ASSERT()