* expression.h (enum exp_opcode): Document OP_COMPLEX to take

	* expression.h (enum exp_opcode): Document OP_COMPLEX to take
	a type parameter as expression element.
	* eval.c (evaluate_subexp_standard) [OP_COMPLEX]: Retrieve result
	type as expression element.
	* f-exp.y: Pass in type when buildin OP_COMPLEX expression.
	* parse.c (operator_length_standard): Update length of OP_COMPLEX.