Manuel Pégourié-Gonnard 2ee8d24ca2 Simplify some constant-time code ...

Some people recommend using bit operations to avoid the compiler producing a
branch on `ret != 0`, but:
- this makes the code less readable,
- here I got a warning from some compilers about unsigned unary minus
- and anyway modern compilers don't produce a branch here, checked on x64 and
  arm with various -O values.

2015-02-11 15:29:15 +00:00

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