Make the constructor for the Lesson 10 explicit
Make the constructor for the Lesson 10 explicit

While this has little effect here, it's a good practice worth getting
used to. I still have to do the same with all the other classes.

TheFakeMontyOnTheRun/nehe-ndk-gles20,TheFakeMontyOnTheRun/nehe-ndk-gles20,TheFakeMontyOnTheRun/nehe-ndk-gles20