Bug #45061 preparedstatement test fails with "not ok 9 - preparedstatement::getWarnings..."

Description:
Unit test preparedstatement test fails with "not ok 9 - preparedstatement::getWarnings..."

How to repeat:
$./test/unit/classes/preparedstatement tcp://127.0.0.1:3350 root "" bug45048
# preparedstatement
1..9
ok 1 - preparedstatement::crash
ok 2 - preparedstatement::anonymousSelect
ok 3 - preparedstatement::InsertSelectAllTypes
ok 4 - preparedstatement::assortedSetType
ok 5 - preparedstatement::setNull
ok 6 - preparedstatement::checkClosed
ok 7 - preparedstatement::getMetaData
ok 8 - preparedstatement::callSP
not ok 9 - preparedstatement::getWarnings # assertEquals(std::string) failed in/Users/apple/Documents/src/mysql-connector-c++-1.0.5/test/unit/classes/preparedstatement.cpp, line #942 expecting '22003' got ''

FAILED tests 9
Failed 1/9, 88.89% okay

Found when tried to verify bug #45048. Probably this is duplicate.

Feature request - 
mysql_warning.cpp

/*
* TODO: implement it. Probably it's not the right place for this function
*/
const sql::SQLString &
errCode2SqlState(int /* errCode */)
{
	static const sql::SQLString state("");

	return state;
}

I believe that is fixed in trunk already