Fix compile (again!)

Author: kngwyu

src/racer/ast.rs

@@ -532,7 +532,7 @@ impl<'c, 's, 'ast> visit::Visitor<'ast> for ExprTypeVisitor<'c, 's> {
                                 // (in which case we return bare type as found in the `impl` header)
                                 if let (Some(Ty::Match(ref mut m)), Some(gen)) = (&mut return_ty, gen) {
                                     for (type_param, arg) in m.generics_mut().zip(gen.args()) {
-                                        if let Some(resolved) = arg {
+                                        if let Some(resolved) = arg.resolved() {
                                             type_param.resolve(resolved.clone());
                                         }
                                     }