fix: resolves react snapshot undefined warning (react-native-maps#2903)

jxeeno · rborn · commit 14f84182e0de · 2019-06-13T09:37:22.000+02:00
diff --git a/lib/components/MapView.js b/lib/components/MapView.js
@@ -537,7 +537,7 @@ class MapView extends React.Component {
     if (this.props.customMapStyle !== prevProps.customMapStyle) {
       this._updateStyle(this.props);
     }
-    return this.props.region;
+    return this.props.region || null;
   }
 
   componentDidUpdate(prevProps, prevState, region) {

Original file line number	Diff line number	Diff line change
`@@ -537,7 +537,7 @@ class MapView extends React.Component {`
`537`	`537`	`if (this.props.customMapStyle !== prevProps.customMapStyle) {`
`538`	`538`	`this._updateStyle(this.props);`
`539`	`539`	`}`
`540`		`- return this.props.region;`
	`540`	`+ return this.props.region \|\| null;`
`541`	`541`	`}`
`542`	`542`
`543`	`543`	`componentDidUpdate(prevProps, prevState, region) {`