[project @ robey@lag.net-20061227214016-ebfnh1q09zt8z3ej]

as john arbash meinel points out, this assert wasn't validating internal
consistency, because a readv() request may ask for more data than is left
in the file.  so remove the assert.

paramiko/sftp_file.py

@@ -464,7 +464,6 @@ class SFTPFile (BufferedFile):
             raise SFTPError('Expected data')
         data = msg.get_string()
         offset, length = self._prefetch_reads.pop(0)
-        assert length == len(data)
         self._prefetch_data[offset] = data
         if len(self._prefetch_reads) == 0:
             self._prefetch_done = True