[pear/Crypt_GPG] 016cbb: Fix possible infinite loop

[email protected] ("Aleksander Machniak via pear-cvs")
Newsgroups php.pear.cvs
Message-ID <pear/Crypt_GPG/push/refs/heads/master/[email protected]>
  Branch: refs/heads/master
  Home:   https://github.com/pear/Crypt_GPG
  Commit: 016cbbec83ee241cf04dd6838a81f85e01402040
      https://github.com/pear/Crypt_GPG/commit/016cbbec83ee241cf04dd6838a81f85e01402040
  Author: Aleksander Machniak <[email protected]>
  Date:   2021-05-25 (Tue, 25 May 2021)

  Changed paths:
    M Crypt/GPG/Engine.php

  Log Message:
  -----------
  Fix possible infinite loop

fwrite() can return false, we need to treat false as an error condition, same as we do with zero.
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