Chase H.Q.: Routine at EBF7

EBF7: Renders strings until it hits a NUL byte

Used by the routines at stt_wait_for_keypress_loop and redefine_keys_48k.
menu_draw_strings	EBF7	CALL menu_draw_string	Call menu_draw_string
	EBFA	LD A,(HL)	If the next byte's zero then return
	EBFB	AND A
	EBFC	RET Z
	EBFD	JR menu_draw_strings	Otherwise loop