* builtins.def (BUILT_IN_CALLOC, BUILT_IN_REALLOC,
	BUILT_IN_ISALNUM, BUILT_IN_ISALPHA, BUILT_IN_ISASCII,
	BUILT_IN_ISBLANK, BUILT_IN_ISCNTRL, BUILT_IN_ISDIGIT,
	BUILT_IN_ISGRAPH, BUILT_IN_ISLOWER, BUILT_IN_ISPRINT,
	BUILT_IN_ISPUNCT, BUILT_IN_ISSPACE, BUILT_IN_ISUPPER,
	BUILT_IN_ISXDIGIT, BUILT_IN_TOASCII, BUILT_IN_TOLOWER,
	BUILT_IN_TOUPPER): Mark as leaf.

From-SVN: r165013