#224 ping forgets charset

[Evan Dower]

When 'ping' reconnects to a server, it forgets the charset applied to the connection. I think this could be solved by overriding 'ping' in Connection.

Like maybe:
def ping(self):
_mysql.connection.ping(self)
self.set_character_set(self.string_decoder.charset)

There may also be other things that get forgotten the should go there too.

See http://trac.edgewall.org/ticket/3723 for additional context, and I'm happy to answer any questions you might have.

Thanks very much,
Evan Dower