Break loop earlier, don't decrement i twice

roomserver/storage/shared/storage.go

@@ -282,17 +282,17 @@ func (d *Database) addState(
 		var found bool
 		for i := len(state) - 1; i >= 0; i-- {
 			found = false
+		blocksLoop:
 			for _, events := range blocks {
 				for _, event := range events {
 					if state[i].EventNID == event {
 						found = true
-						break
+						break blocksLoop
 					}
 				}
 			}
 			if found {
 				state = append(state[:i], state[i+1:]...)
-				i--
 			}
 		}
 	}