[dovecot/core] 61d57e: lib: Added assert to iostream-temp

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/dovecot/core
  Commit: 61d57efe9dee0dd38b0f726ef85e3c710cb655fc
      https://github.com/dovecot/core/commit/61d57efe9dee0dd38b0f726ef85e3c710cb655fc
  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.