Misreports file size for large file transfers

[stickynips]

I'm using Pidgin 2.0 on Windows XP SP2. When transferring a large file, nearly 19GB in this case, pidgin misreports the file size in the transfer window. Although it doesn't hinder the file transfer at all, it's a minor annoyance not knowing how much longer you've got left on your transfer.

At the bottom of the picture you will see the file size that Windows reports, as opposed to the "-2033252893 bytes" that Pidgin reports. It seems to me like an integer overflow error. The computer on the other end of the transfer (running Pidgin as well) experienced the same error.

[rekkanoryo]

duplicate of #1185