* fold-const.c (fold, fold_relational_hi_lo,
	nondestructive_fold_binary_to_constant,
	fold_read_from_constant_string): Use fold_convert instead of convert.
	* builtins.c (simplify_builtin, simplify_builtin_strstr,
	simplify_builtin_strchr, simplify_builtin_strrchr,
	simplify_builtin_strpbrk): Use fold_convert instead of convert.

From-SVN: r82102