Move call of is_range_expression() outside of blocks

Author: ordovicia

Diff for: clippy_lints/src/redundant_field_names.rs

@@ -36,17 +36,17 @@ impl LintPass for RedundantFieldNames {
 
 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for RedundantFieldNames {
     fn check_expr(&mut self, cx: &LateContext<'a, 'tcx>, expr: &'tcx Expr) {
+        // Do not care about range expressions.
+        // They could have redundant field name when desugared to structs.
+        // e.g. `start..end` is desugared to `Range { start: start, end: end }`
+        if is_range_expression(expr.span) {
+            return;
+        }
+
         if let ExprStruct(_, ref fields, _) = expr.node {
             for field in fields {
                 let name = field.name.node;
 
-                // Do not care about range expressions.
-                // They could have redundant field name when desugared to structs.
-                // e.g. `start..end` is desugared to `Range { start: start, end: end }`
-                if is_range_expression(expr.span) {
-                    continue;
-                }
-
                 if match_var(&field.expr, name) && !field.is_shorthand {
                     span_lint_and_sugg (
                         cx,