parse.y (make_plus_expression): New function.

parse.y (make_plus_expression): New function.

	* parse.y (make_plus_expression): New function.
	(expression:): Use make_plus_expression for PLUS, MINUS,
	ASSIGN and EQUALS.
	* tree1.c (treelang_decode_option): Don't fall through to
	options that start with a different character when an option
	was not recognized.

From-SVN: r66303