travis fix

Former-commit-id: 5713ab4e4654a5b037fb6d6156001ee841a5dc15

.travis.yml

@@ -63,5 +63,5 @@ matrix:
         - cd tutorial
         - mkdir build
         - cd build
-        - cmake -DLIBIGL_USE_STATIC_LIBRARY=ON 
+        - cmake -DLIBIGL_USE_STATIC_LIBRARY=ON ../
         - make -j 2