Cactus flower's hitbox is slightly larger than it should be

The hitbox is slightly larger than that of a cactus, making it inconsistent, and it doesn't match Java's hitbox.

Steps to reproduce:
1. Search or plant a cactus.
2. Put a cactus flower and see the hitbox.

Expected result:
The cactus flower hitbox has the same width as the cactus.

Observed result:
The cactus flower hitbox is slightly larger than the cactus.