[Tilesathome] Minor issue with string concatenation

[Henrik Niehaus]

Just a minor issue

[#52  50% upload] uploaded captionless_12_702_3175_62902.zip. Idle for
29 (Total 1:01)... Use of uninitialized value in concatenation (.) or
string at Request.pm line 143.
Use of uninitialized value in concatenation (.) or string at Request.pm
line 143.
Use of uninitialized value in concatenation (.) or string at Request.pm
line 143.