Web demo: Fix edge case in server.py
Web demo: Fix edge case in server.py

+ This resolves #20.
+ Edge case is when just a single person is known.

francisleunggie/openface,sumsuddinshojib/openface,nhzandi/openface,francisleunggie/openface,sumsuddinshojib/openface,nmabhi/Webface,nhzandi/openface,nmabhi/Webface,Alexx-G/openface,nmabhi/Webface,Alexx-G/openface,francisleunggie/openface,xinfang/face-recognize,nmabhi/Webface,cmusatyalab/openface,xinfang/face-recognize,Alexx-G/openface,sumsuddinshojib/openface,xinfang/face-recognize,nhzandi/openface,sumsuddinshojib/openface,cmusatyalab/openface,cmusatyalab/openface,Alexx-G/openface