Use next instead of nth(0)

As suggested by clippy we can use `.next()` on an iterator instead of
`nth(0)`. Although arguably no clearer, and certainly no worse, it keeps
clippy quiet and a clean lint is a good thing.

diff --git a/src/wallet/mod.rs b/src/wallet/mod.rs
index 8bb254c488b3c7e142c0a4d55ad037bfe5a75b35..8f26d06fc24daf54fb36276b404c8707e20711bc 100644 (file)
--- a/src/wallet/mod.rs
+++ b/src/wallet/mod.rs
@@ -1942,7 +1942,7 @@ mod test {
 
         assert_eq!(psbt.inputs[0].bip32_derivation.len(), 1);
         assert_eq!(
-            psbt.inputs[0].bip32_derivation.values().nth(0).unwrap(),
+            psbt.inputs[0].bip32_derivation.values().next().unwrap(),
             &(
                 Fingerprint::from_str("d34db33f").unwrap(),
                 DerivationPath::from_str("m/44'/0'/0'/0/0").unwrap()
@@ -1968,7 +1968,7 @@ mod test {
 
         assert_eq!(psbt.outputs[0].bip32_derivation.len(), 1);
         assert_eq!(
-            psbt.outputs[0].bip32_derivation.values().nth(0).unwrap(),
+            psbt.outputs[0].bip32_derivation.values().next().unwrap(),
             &(
                 Fingerprint::from_str("d34db33f").unwrap(),
                 DerivationPath::from_str("m/44'/0'/0'/0/5").unwrap()