Fix duplicate error code

Author: petrochenkov

src/librustc_resolve/diagnostics.rs

@@ -24,7 +24,7 @@ register_diagnostics! {
     E0258, // import conflicts with existing submodule
     E0259, // an extern crate has already been imported into this module
     E0260, // name conflicts with an external crate that has been imported into this module
-    E0316 // user-defined types or type parameters cannot shadow the primitive types
+    E0317 // user-defined types or type parameters cannot shadow the primitive types
 }
 
 __build_diagnostic_array! { DIAGNOSTICS }

src/librustc_resolve/lib.rs

@@ -2786,7 +2786,7 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> {
 
     fn check_if_primitive_type_name(&self, name: Name, span: Span) {
         if let Some(_) = self.primitive_type_table.primitive_types.get(&name) {
-            span_err!(self.session, span, E0316,
+            span_err!(self.session, span, E0317,
                 "user-defined types or type parameters cannot shadow the primitive types");
         }
     }