Merge rust-bitcoin#4938: fix: resolve clippy::len_zero lint in Instructions::size_hint

b5d4f4f fix: resolve clippy::len_zero lint in Instructions::size_hint (Bugar)

Pull request description:

  Replace `self.data.len() == 0` with `self.data.as_slice().is_empty()` to fix clippy::len_zero warning in the size_hint implementation for Instructions iterator.
  
  This addresses the Clippy lint that recommends using is_empty() instead of comparing len() to zero, which is more idiomatic Rust. Uses stable slice.is_empty() via as_slice() to avoid unstable exact_size_is_empty feature.
  
  Fixes: clippy::len_zero warning in bitcoin/src/blockdata/script/instruction.rs:193


ACKs for top commit:
  apoelstra:
    ACK b5d4f4f; successfully ran local tests


Tree-SHA512: bcbdb6573169ce6e742df5d09af2db877d469cd518eb6b445e824e2b7b330a4955311787683c7a5c362b462aec0bdde1f3b3dd0b4593f721e6156c29a18d4e32

Author: apoelstra

bitcoin/src/blockdata/script/instruction.rs

@@ -190,7 +190,7 @@ impl<'a> Iterator for Instructions<'a> {
 
     #[inline]
     fn size_hint(&self) -> (usize, Option<usize>) {
-        if self.data.len() == 0 {
+        if self.data.as_slice().is_empty() {
             (0, Some(0))
         } else {
             // There will not be more instructions than bytes