correct arithmetic adjustments

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/database/key_value/rooms/state_accessor.rs

@@ -25,7 +25,7 @@ impl service::rooms::state_accessor::Data for KeyValueDatabase {
 				.parse_compressed_state_event(compressed)?;
 			result.insert(parsed.0, parsed.1);
 
-			i = i.saturating_add(1);
+			i = i.wrapping_add(1);
 			if i % 100 == 0 {
 				tokio::task::yield_now().await;
 			}
@@ -63,7 +63,7 @@ impl service::rooms::state_accessor::Data for KeyValueDatabase {
 				);
 			}
 
-			i = i.saturating_add(1);
+			i = i.wrapping_add(1);
 			if i % 100 == 0 {
 				tokio::task::yield_now().await;
 			}

src/database/key_value/rooms/timeline.rs

@@ -284,11 +284,7 @@ fn count_to_id(room_id: &RoomId, count: PduCount, offset: u64, subtract: bool) -
 			pdu_id.extend_from_slice(&0_u64.to_be_bytes());
 			let num = u64::MAX.saturating_sub(x);
 			if subtract {
-				if num > 0 {
-					num.saturating_sub(offset)
-				} else {
-					num
-				}
+				num.saturating_sub(offset)
 			} else {
 				num.saturating_add(offset)
 			}