If the count changes from prepare to execute and result_bind is
alreadly allocated, reallocate it there.
This is something of a hack. It would be cleaner to require that
result bindings are registered only after execute, when the final
result set fields are known. But mysqli at least directly exposes
this to the user, so we have no guarantee.
When stored procedures are called, the "final result set is a status
result that includes no result set". Calling `::nextRowset()` on the
actual last result set should return FALSE, since there is actually no
further result set to be processed.
pecl#12794, pecl#12401
# Running the tests:
# (Note: Doesn't work currnetly on HEAD, see:
# http://news.php.net/php.qa/64378)
#
# PDO_MYSQL_TEST_DSN - DSN
# For example: mysql:dbname=test;host=localhost;port=3306
#
# PDO_MYSQL_TEST_HOST - database host
# PDO_MYSQL_TEST_DB - database (schema) name
# PDO_MYSQL_TEST_SOCKET - database server socket
# PDO_MYSQL_TEST_ENGINE - storage engine to use
# PDO_MYSQL_TEST_USER - database user
# PDO_MYSQL_TEST_PASS - database user password
# PDO_MYSQL_TEST_CHARSET - database charset
#
# NOTE: if any of PDO_MYSQL_TEST_[HOST|DB|SOCKET|ENGINE|CHARSET] is
# part of PDO_MYSQL_TEST_DSN, the values must match. That is, for example,
# for PDO_MYSQL_TEST_DSN = mysql:dbname=test you MUST set PDO_MYSQL_TEST_DB=test.
