Fix for LP#697622 Assertion `! is_set()' failed when preparing a HANDLER statement

mysql-test/suite/handler/interface.result:
  Test case
mysql-test/suite/handler/interface.test:
  Test case
sql/sql_prepare.cc:
  Fix for LP#697622 Assertion `! is_set()' failed when preparing a HANDLER statement
  Return TRUE if mysql_test_handler_read() fails.

mysql-test/suite/handler/interface.result

@@ -257,3 +257,5 @@ drop table t1;
 USE information_schema;
 HANDLER COLUMNS OPEN;
 ERROR HY000: Incorrect usage of HANDLER OPEN and information_schema
+PREPARE h_r FROM 'HANDLER t1 READ `PRIMARY` LAST';
+ERROR 42S02: Unknown table 't1' in HANDLER

mysql-test/suite/handler/interface.test

@@ -305,3 +305,9 @@ connection default;
 USE information_schema;
 --error ER_WRONG_USAGE
 HANDLER COLUMNS OPEN;
+
+#
+# LP#697622 Assertion `! is_set()' failed when preparing a HANDLER statement
+#
+--error ER_UNKNOWN_TABLE
+PREPARE h_r FROM 'HANDLER t1 READ `PRIMARY` LAST';

sql/sql_prepare.cc

@@ -2004,11 +2004,8 @@ static bool check_prepared_statement(Prepared_statement *stmt)
 
   case SQLCOM_HA_READ:
     res= mysql_test_handler_read(stmt, tables);
-    {
     /* Statement and field info has already been sent */
-      DBUG_RETURN(FALSE);
-    }
-    break;
+    DBUG_RETURN(res == 1 ? TRUE : FALSE);
 
     /*
       Note that we don't need to have cases in this list if they are