Don't use the MYSQL* returned from mysql_real_connect to overwrite the already...

Don't use the MYSQL* returned from mysql_real_connect to overwrite the already initalised mysql variable


client/mysqlslap.c:
  Only use the MYSQL* returned from mysql_reqal_connect as an indicator wether the connect was successfull or not.
  As the manual says about the return value from mysql_real_connect: "A MYSQL* connection handle if the connection
  was successful, NULL if the connection was unsuccessful. For a successful connection, the 
  return value is the same as the value of the first parameter."

client/mysqlslap.c

@@ -1132,11 +1132,11 @@ run_task(thread_context *con)
   my_lock(lock_file, F_RDLCK, 0, F_TO_EOF, MYF(0));
   if (!opt_only_print)
   {
-    if (!(mysql= mysql_real_connect(mysql, host, user, opt_password,
-                                    create_schema_string,
-                                    opt_mysql_port,
-                                    opt_mysql_unix_port,
-                                    0)))
+    if (!(mysql_real_connect(mysql, host, user, opt_password,
+                             create_schema_string,
+                             opt_mysql_port,
+                             opt_mysql_unix_port,
+                             0)))
     {
       fprintf(stderr,"%s: %s\n",my_progname,mysql_error(mysql));
       goto end;