Minor refactoring to remove compile warnings and possibly fix the
Solaris test failures.


sql/log_event.cc:
  WL#3228 (NDB) : RBR using different table defs on slave/master
  
  Minor refactoring.
sql/rpl_utility.cc:
  WL#3228 (NDB) : RBR using different table defs on slave/master
  
  Minor refactoring.
sql/rpl_utility.h:
  WL#3228 (NDB) : RBR using different table defs on slave/master
  
  Minor refactoring.