reflect: fix Type.Name to return empty string for non-named types

// Name returns the type's name within its package for a defined type.
    // For other (non-defined) types it returns the empty string.

src/reflect/type.go

@@ -923,9 +923,13 @@ func (t *rawType) Name() string {
 		return readStringZ(unsafe.Pointer(&ntype.name[0]))
 	}
 
+	if t.Kind() <= UnsafePointer {
 		return t.Kind().String()
 	}
 
+	return ""
+}
+
 func (t *rawType) Key() Type {
 	return t.key()
 }