If the output buffer in the TurboJPEG destination manager was allocated by the destin...

If the output buffer in the TurboJPEG destination manager was allocated by the destination manager and is being reused from a previous compression operation, then we need to get the buffer size from the previous operation, since the calling program doesn't know the actual buffer size.

git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1368 632fc199-4ca6-4c93-a231-07263d6284db