Created Unassigned: ReadExtensionPair doesn't return when it has looped through all the extensions [2749]

ReadExtensionPair() in ReadAttributes() in SftpMessages doesn't pass in the extendedCount. This results in issues (for myself) when listing files in a directory with more than one file. This can be solved by adding a condition in ReadExtensionPair() to exit when it has reached the extendedCount.