Fix a hang on the adaptive hash S-latch if an application program uses mysql_use_result() and performs queries on two connections at the same time


sql/sql_class.cc:
  Fix a hang on the adaptive hash S-latch if an application program uses mysql_use_result() and performs queries on two connections at the same time
sql/handler.cc:
  Fix a hang on the adaptive hash S-latch if an application program uses mysql_use_result() and performs queries on two connections at the same time
sql/handler.h:
  Fix a hang on the adaptive hash S-latch if an application program uses mysql_use_result() and performs queries on two connections at the same time
sql/ha_innodb.cc:
  Fix a hang on the adaptive hash S-latch if an application program uses mysql_use_result() and performs queries on two connections at the same time
sql/ha_innodb.h:
  Fix a hang on the adaptive hash S-latch if an application program uses mysql_use_result() and performs queries on two connections at the same time