[librsvg: 3/8] Fix clippy warning for single-branch `match`

[Marge Bot <marge-bot src gnome org>]

commit 1787599866373426c6c68ce5f7041158815b1589
Author: Michael Howell <michael notriddle com>
Date:   Wed Oct 13 13:43:46 2021 -0700

    Fix clippy warning for single-branch `match`
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/606>

 src/element.rs | 25 +++++++++++--------------
 1 file changed, 11 insertions(+), 14 deletions(-)
---
diff --git a/src/element.rs b/src/element.rs
index 782acf67..78215028 100644
--- a/src/element.rs
+++ b/src/element.rs
@@ -204,20 +204,17 @@ impl<T: SetAttributes + Draw> ElementInner<T> {
 
     fn set_language_attribute(&mut self) -> Result<(), ElementError> {
         for (attr, value) in self.attributes.iter() {
-            match attr.expanded() {
-                expanded_name!(xml "lang") => {
-                    self.language = Some(
-                        LanguageTag::from_str(value)
-                            .map_err(|e| {
-                                ValueErrorKind::parse_error(&format!(
-                                    "invalid language tag: \"{}\"",
-                                    e
-                                ))
-                            })
-                            .attribute(attr)?,
-                    );
-                }
-                _ => {}
+            if attr.expanded() == expanded_name!(xml "lang") {
+                self.language = Some(
+                    LanguageTag::from_str(value)
+                        .map_err(|e| {
+                            ValueErrorKind::parse_error(&format!(
+                                "invalid language tag: \"{}\"",
+                                e
+                            ))
+                        })
+                        .attribute(attr)?,
+                );
             }
         }
         Ok(())