[Bleeding] Store correct block type when hitting blocks. Fixes BUKKIT-5209

The block obtained and stored within the block object higher up does not
reflect the block at the location being hit, rather it is the air block
the arrow was previously in.  Thusly when the variable is used to check
if the arrow is still in the block, it fails.

src/main/java/net/minecraft/server/EntityArrow.java

@@ -280,7 +280,7 @@ public class EntityArrow extends Entity implements IProjectile {
                     this.d = movingobjectposition.b;
                     this.e = movingobjectposition.c;
                     this.f = movingobjectposition.d;
-                    this.g = block;
+                    this.g = this.world.getType(d, e, f); // CraftBukkit - Get correct block for storage
                     this.h = this.world.getData(this.d, this.e, this.f);
                     this.motX = (double) ((float) (movingobjectposition.pos.c - this.locX));
                     this.motY = (double) ((float) (movingobjectposition.pos.d - this.locY));