openpgp: Pass MessageStructure by value, not reference.

  - Instead of passing MessageStructure to VerificationHelper::check
    by reference, pass it by value.

  - After calling VerificationHelper::check, it is dropped.  Passing
    it by value allows the caller to avoid some cloning.

2 files changed, 2 insertions, 2 deletions

diff --git a/tool/src/commands/decrypt.rs b/tool/src/commands/decrypt.rs
index 2ab0f32c..325a657d 100644
--- a/tool/src/commands/decrypt.rs
+++ b/tool/src/commands/decrypt.rs
@@ -130,7 +130,7 @@ impl<'a> VerificationHelper for Helper<'a> {
     fn get_public_keys(&mut self, ids: &[openpgp::KeyHandle]) -> Result<Vec<Cert>> {
         self.vhelper.get_public_keys(ids)
     }
-    fn check(&mut self, structure: &MessageStructure) -> Result<()> {
+    fn check(&mut self, structure: MessageStructure) -> Result<()> {
         self.vhelper.check(structure)
     }
 }
diff --git a/tool/src/commands/mod.rs b/tool/src/commands/mod.rs
index 12ca6c6a..25b94198 100644
--- a/tool/src/commands/mod.rs
+++ b/tool/src/commands/mod.rs
@@ -356,7 +356,7 @@ impl<'a> VerificationHelper for VHelper<'a> {
         Ok(certs)
     }
 
-    fn check(&mut self, structure: &MessageStructure) -> Result<()> {
+    fn check(&mut self, structure: MessageStructure) -> Result<()> {
         for layer in structure.iter() {
             match layer {
                 MessageLayer::Compression { algo } =>