fix: ignore prototype's keys in a handful of for...in loops

src/core/components/layout-utils.jsx

@@ -57,6 +57,9 @@ export class Col extends React.Component {
     let classesAr = []
 
     for (let device in DEVICES) {
+      if (!DEVICES.hasOwnProperty(device)) {
+        continue
+      }
       let deviceClass = DEVICES[device]
       if(device in this.props) {
         let val = this.props[device]

src/core/plugins/samples/fn.js

@@ -181,6 +181,9 @@ export const sampleXmlFromSchema = (schema, config={}) => {
     example = example || {}
 
     for (let propName in props) {
+      if (!props.hasOwnProperty(propName)) {
+        continue
+      }
       if ( props[propName].readOnly && !includeReadOnly ) {
         continue
       }

src/core/utils.js

@@ -607,6 +607,9 @@ export const parseSearch = () => {
     let params = search.substr(1).split("&")
 
     for (let i in params) {
+      if (!params.hasOwnProperty(i)) {
+        continue
+      }
       i = params[i].split("=")
       map[decodeURIComponent(i[0])] = decodeURIComponent(i[1])
     }