* cpplex.c (cpp_output_token): Use a putc loop for
	SPELL_OPERATOR, and fwrite for SPELL_IDENT.

	* configure.in: Detect fwrite_unlocked and fprintf_unlocked.
	* configure, config.in: Regenerate.
	* system.h: Replace fwrite and fprintf with their unlocked
	variants if available.

From-SVN: r45855