Question to rev 17981 (packet-isup.c)

Hello List,

since rev 17981 the protocol ISUP is displayed in the summary line as 
	MTP3 (Int. ITU)ISUP(ITU)
instead of 
	ISUP (ITU)

It now uses col_append_str() instead of col_set_str() (line 6619-6631).
Is that on purpose or by accident.

Best regards
Claudia Becker