Make Substrate compile with latest nightly (#7381)

* Try to get it compiling

* One more

* Make stable happy

* Make stable even more happy ;)

* Update shell.nix

substrate/frame/treasury/src/lib.rs

@@ -1410,7 +1410,12 @@ impl<T: Trait<I>, I: Instance> Module<T, I> {
 		BountyCount::<I>::put(index + 1);
 
 		let bounty = Bounty {
-			proposer, value, fee: 0.into(), curator_deposit: 0.into(), bond, status: BountyStatus::Proposed,
+			proposer,
+			value,
+			fee: 0u32.into(),
+			curator_deposit: 0u32.into(),
+			bond,
+			status: BountyStatus::Proposed,
 		};
 
 		Bounties::<T, I>::insert(index, &bounty);