[BUG] 10th seed slot is ignored by sun-producing plant validation

Platform: PC / Steam
Game: Plants vs. Zombies: Replanted
Mode: Adventure — Roof (World 5)

Description:

After purchasing the 10th seed slot, I discovered that the game fails to recognize Sunflower when it is placed in that slot.

Steps to reproduce:

1. Unlock all 10 seed slots.
2. Start a Roof level in Adventure Mode.
3. Select Sunflower as the only sun-producing plant and place it in slot 10.
4. Fill the remaining slots with other plants.
5. Click "Let's Rock!"

Actual result:

The game incorrectly displays:
"You haven't chosen any sun producing plants, are you sure you want to continue?"

Expected result:

No warning should appear because Sunflower is selected.

Additional testing:

I swapped Sunflower (slot 10) with Cherry Bomb (slot 9), keeping all the same plants selected.
The warning immediately disappeared.
This suggests that the validation logic only checks the first 9 seed slots and ignores the 10th slot.

Workaround:

Move Sunflower to any of the first 9 slots.

Attachment:

Screenshot showing Sunflower in slot 10 and the incorrect warning.