Fixed broke image on guardarmodal when resource doesn't have a thumbnail

src/Components/GuardarModal.js

@@ -140,7 +140,7 @@ export default function ReportModal(props) {
                         </Header>
                         <Content style={{ paddingTop: "0" }}>
                             <ResourceInfo>
-                                <img src={apiDomain + props.thumb} alt="thumbnail recurso" />
+                                <img src={props.thumb ? apiDomain + props.thumb : require('../img/logo_small.svg')} alt="thumbnail recurso" />
                                 <div className="text">
                                     <h3>{props.title}</h3>
                                 </div>