Small fix

From this issue: vault-development#137

Author: MiguelCorti

index.js

@@ -151,7 +151,7 @@ class SvgUri extends Component{
 
   // Remove empty strings from children array
   trimElementChilden(children) {
-    for (child of children) {
+    for (let child of children) {
       if (typeof child === 'string') { 
         if (child.trim().length === 0) 
           children.splice(children.indexOf(child), 1);