* regex.c: Indent cpp directives and remove parens after `defined'.

* regex.c: Indent cpp directives and remove parens after `defined'.
(PTR_TO_OFFSET, POS_AS_IN_BUFFER): Move to a better place.
(ISDIGIT, ISCNTRL, ISXDIGIT) [!emacs]: Remove duplicate definition.
(regex_compile): Use RE_FRUGAL instead of RE_ALL_GREEDY.
(re_compile_pattern): Use size_t for length.
(init_syntax_once): Move to a better place.
* regex.h: Merge changes from GNU libc.  Indent cpp directives.
(RE_FRUGAL): Replaces RE_ALL_GREEDY (inverted meaning).