Zero refund check for FungibleAdapter

[Dinonard]

FungibleAdapter will now check if the refund amount is zero before calling deposit & emitting an event.

Fixes #6469.

[franciscoaguirre]

/cmd prdoc

[franciscoaguirre]

@Dinonard Please edit the prdoc, bump should be patch, audience "Runtime User"

[Dinonard]

Forgot about PR doc, my bad.

Done now.

[Dinonard]

Can this be merged via the bot?

[Dinonard]

@franciscoaguirre could you please merge this?

[paritytech-cmd-bot-polkadot-sdk]

Created backport PR for stable2407:

• [stable2407] Backport #6506 #6657 with remaining conflicts!

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin backport-6506-to-stable2407
git worktree add --checkout .worktree/backport-6506-to-stable2407 backport-6506-to-stable2407
cd .worktree/backport-6506-to-stable2407
git reset --hard HEAD^
git cherry-pick -x f520adb0aacd51247ed548c7db9bef874c2cca9e
git push --force-with-lease

[paritytech-cmd-bot-polkadot-sdk]

Created backport PR for stable2409:

• [stable2409] Backport #6506 #6658 with remaining conflicts!

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin backport-6506-to-stable2409
git worktree add --checkout .worktree/backport-6506-to-stable2409 backport-6506-to-stable2409
cd .worktree/backport-6506-to-stable2409
git reset --hard HEAD^
git cherry-pick -x f520adb0aacd51247ed548c7db9bef874c2cca9e
git push --force-with-lease