[ticket/13087] Correctly link to user profile when contact field has no URL

Broken by 975c5655f0e9b65b7de3f2b832f1ef660a473832

PHPBB3-13087
Merge pull request #2993 from nickvergessen/ticket/13087

[ticket/13087] Correctly link to user profile when contact field has no URL
Merge branch 'develop-ascraeus' into develop