Do not add offset to the "length" argument for mmap call as it should be
passed as the last argument instead. This was not causing any problems
since the offset is usually 0, but it's still better to do it correctly.
Bug: webrtc:42225999
Change-Id: If1dbe7dfd2fb22c53493c0fafd23d782f0683a11
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/354521
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Commit-Queue: Jan Grulich <grulja@gmail.com>
Cr-Commit-Position: refs/heads/main@{#42481}
3252f5d8e4