Fangs cannot be summoned on transparent blocks

Fangs cannot be summoned on transparent blocks.

When transparent blocks height = 1 block, not spawned fangs.
When transparent blocks height < 1 block, spawned fangs in below the transparent blocks.

This makes evoker almost cannot attacks when player on a transparent blocks.

Affected blocks:

1. grass path

2. farmland

3. snow layer

4. bed

5. all slab(half)

6. end portal frame

7. enchanting table

8. glass

9. all stairs

10. ice

11. glowstone

12. sea lantern

13. stained glass

14. chest

15. ender chest

16. anvil

17. trapped chest

18. light detector

19. shulker box

20. all leaves

21. cactus

22. beacon

23. piston

24. sticky piston

25. TNT

26. cake

27. frosted ice

28. dragon egg