[PATCH] Fix -Wundef warnings in regex_internal.h

[Siddhesh Poyarekar]

On Thu, Jul 31, 2014 at 02:08:33PM -0700, Roland McGrath wrote:
> OK, but you should follow up with gnulib to clean up all unnecessary _LIBC
> tests and then re-synch our copies.

Ack, I'll do a more comprehensive synch when 2.21 opens.

Siddhesh
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