Improvements to DiscIO::CompressFileToBlob and DecompressBlobToFile #2155
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This PR fixes some issues with CompressFileToBlob and DecompressBlobToFile.
Previously, failed writes were ignored and processing continued and showed success to the user instead of aborting with an error message (Issue 7867).
If deflateInit failed (highly unlikely), DiscScrubber::Cleanup wasn't called leading to a memory leak.
The functions now delete the output file if processing fails.
Moved the DiscScrubber setup code below the code for opening files.
Removed now unnecessary label.