[issue19537] Fix misalignment in fastsearch_memchr_1char

[Antoine Pitrou]

Antoine Pitrou added the comment:

I don't understand in which concrete situation the current code could be wrong. The start of the unicode string should always be aligned, due to how unicode objects are allocated.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19537>
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