[Perl/perl5] 0b47b3: UTF8_IS_NEXT_CHAR_DOWNGRADEABLE() check before deref

Sat, 29 May 2021 05:04:45 -0700 

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 0b47b39244b67fe19dc971903ce28a7a637c2a9a
      
https://github.com/Perl/perl5/commit/0b47b39244b67fe19dc971903ce28a7a637c2a9a
  Author: Karl Williamson <[email protected]>
  Date:   2021-05-29 (Sat, 29 May 2021)

  Changed paths:
    M utf8.h

  Log Message:
  -----------
  UTF8_IS_NEXT_CHAR_DOWNGRADEABLE() check before deref

Reorder the clauses to check first before dereferencing

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