The st_lex::which_check_option_applicable() function controls for which 
statements WITH CHECK OPTION clause should be taken into account. REPLACE and
REPLACE_SELECT wasn't in the list which results in allowing REPLACE to insert
wrong rows in a such view.

The st_lex::which_check_option_applicable() now includes REPLACE and 
REPLACE_SELECT in the list of statements for which WITH CHECK OPTION clause is
applicable.


mysql-test/t/replace.test:
  Added test case for bug#19789: REPLACE was allowed for a VIEW with CHECK OPTION enabled.
mysql-test/r/replace.result:
  Added test case for bug#19789: REPLACE was allowed for a VIEW with CHECK OPTION enabled.
sql/sql_lex.h:
  Fixed bug#19789: REPLACE was allowed for a VIEW with CHECK OPTION enabled.
  The st_lex::which_check_option_applicable() now includes REPLACE and 
  REPLACE_SELECT in the list of statements for which WITH CHECK OPTION clause is
  applicable.