#5 Growl message fix patch

[Atsuhiro IGARASHI]

This patch will fix some Growl messages below.
1. "... other folder(null)." (64-bit only?)
2. If there is more than one unread mailbox, the contents of the message was different from the actual.

Also, adding a patch that reduce warnings in the build process.

[Atsuhiro IGARASHI]

[Atsuhiro IGARASHI]