Simplify unsafe expr collection match

Author: Nashenas88

crates/ra_hir_ty/src/unsafe_validation.rs

@@ -108,13 +108,12 @@ fn walk_unsafe(
                 unsafe_exprs.push(UnsafeExpr { expr: current, inside_unsafe_block });
             }
         }
+        Expr::Unsafe { body: child } => {
+            return walk_unsafe(unsafe_exprs, db, infer, body, *child, true);
+        }
         _ => {}
     }
 
-    if let &Expr::Unsafe { body: child } = expr {
-        return walk_unsafe(unsafe_exprs, db, infer, body, child, true);
-    }
-
     expr.walk_child_exprs(|child| {
         walk_unsafe(unsafe_exprs, db, infer, body, child, inside_unsafe_block);
     });