pull up r22348 from trunk

pull up r22348 from trunk

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 r22348 | tlyu | 2009-05-13 22:41:37 +0200 (Wed, 13 May 2009) | 13 lines

 ticket: 6486
 tags: pullup
 target_version: 1.7

 In util/support/utf8_conv.c, the SWAP16 macro is invoked with an
 argument that has side effects.  On platforms where SWAP16 can
 evaluate its argument twice (including platforms where utf8_conv.c
 creates a fallback definition for the SWAP16 macro), this can cause a
 read overrun by a factor of two.

 Rearrange the data flow to avoid calling SWAP16 with an argument that
 has side effects.

ticket: 6486
version_fixed: 1.7

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-7@22371 dc483132-0cff-0310-8789-dd5450dbe970