#define macro improvement


mysql-test/r/sp-security.result:
  BUG#9503: reseting correct parameters of thread after error in SP function
mysql-test/t/sp-security.test:
  BUG#9503: reseting correct parameters of thread after error in SP function
sql/item_func.cc:
  fixed environment restoring in case of error during SP function execution
sql/protocol.cc:
  added debug print
sql/sql_class.h:
  fixed #defines to force them to be alvaise in piar, and variable name made more complex for accident repeating in other code