[ticket/12791] String profile fields do not use links ...

smilies and line breaks in memberlist

The value is overwritten with the contact value
Added aditional check if the field is a contact so we don't overwrite it.

PHPBB3-12791
[ticket/12791] Changed the if check

Removed unneeded variable

PHPBB3-12791
Merge pull request #2719 from lucifer4o/ticket/12791

[ticket/12791] String profile fields do not use links ...

* lucifer4o/ticket/12791:
  [ticket/12791] Changed the if check
  [ticket/12791] String profile fields do not use links ...