Fix style warnings for rustc 1.76.0

Test: Built with test_compiler.py
Bug: 327204642
Change-Id: I95f8965cb1db564fb3c86b4529aa707d1b75fd78
diff --git a/keystore2/legacykeystore/lib.rs b/keystore2/legacykeystore/lib.rs
index f7a8198..db3eff6 100644
--- a/keystore2/legacykeystore/lib.rs
+++ b/keystore2/legacykeystore/lib.rs
@@ -55,7 +55,7 @@
         F: Fn(&Transaction) -> Result<T>,
     {
         loop {
-            match self
+            let result = self
                 .conn
                 .transaction_with_behavior(behavior)
                 .context("In with_transaction.")
@@ -63,7 +63,8 @@
                 .and_then(|(result, tx)| {
                     tx.commit().context("In with_transaction: Failed to commit transaction.")?;
                     Ok(result)
-                }) {
+                });
+            match result {
                 Ok(result) => break Ok(result),
                 Err(e) => {
                     if Self::is_locked_error(&e) {