Prolog lab checker showing "solved exercise" message even though not solved

[Florin Mihalache]

Steps to reproduce:

1. go to the solution file (lab 10 for example)
2. go to a random exercise (it doesn't matter which one)
3. set the exercise implementation with the default one from skeleton
4. run the checker, which will show both Nerezolvat. and Exercițiul X rezolvat corect!

[andreiolaru]

Solved by removal of the message.