Fixed clippy warnings

src/consistency.rs

@@ -80,8 +80,7 @@ where
         // We have a special case when the old tree is a subtree of the current tree. This happens
         // when the old tree is a complete binary tree OR when the old tree equals this tree (i.e.,
         // nothing changed between the trees).
-        let oldtree_is_subtree =
-            slice_size.is_power_of_two() || slice_size == num_tree_leaves as usize;
+        let oldtree_is_subtree = slice_size.is_power_of_two() || slice_size == num_tree_leaves;
 
         // If the old tree is a subtree, then the starting idx for the path is the subtree root
         let mut path_idx = if oldtree_is_subtree {

src/merkle_tree.rs

@@ -250,7 +250,7 @@ where
 
     /// Tries to get the item at the given index
     pub fn get(&self, idx: usize) -> Option<&T> {
-        self.leaves.get(idx as usize)
+        self.leaves.get(idx)
     }
 
     /// Returns all the items