[dovecot/core] e1295b: lib: Added assert to iostream-temp

[GitHub]

  Branch: refs/heads/master-2.2
  Home:   https://github.com/dovecot/core
  Commit: e1295b9399d9437d842a8b4832992745923c55c6
      https://github.com/dovecot/core/commit/e1295b9399d9437d842a8b4832992745923c55c6
  Author: Timo Sirainen <timo.sirainen at dovecot.fi>
  Date:   2016-06-28 (Tue, 28 Jun 2016)

  Changed paths:
    M src/lib/iostream-temp.c

  Log Message:
  -----------
  lib: Added assert to iostream-temp

Input stream isn't expected to shrink here. Potentially this could be
changed to an error instead.