Fix compilation errors

[Steffo99]

When I tried to build SCJingleConverter I had two compilation errors due to two functions that weren't always returning a value in all paths.

So... I fixed them by replacing the switch pattern with a if and an else.

Hope I didn't break anything else by doing that!

My Windows build seems to be working so far...

[MeblIkea]

Oh yes it work, and builded! Thanks!!