prevent crash when app is run under http, #763

src/widgets/send-message.jsx

@@ -45,7 +45,7 @@ class SendMessage extends React.PureComponent {
       quote: null,
       message: '',
       audioRec: false,
-      audioAvailable: !!navigator.mediaDevices.getUserMedia,
+      audioAvailable: !!(navigator.mediaDevices && navigator.mediaDevices.getUserMedia),
       // Make initial keypress time as if it happened 5001 milliseconds in the past.
       keypressTimestamp: new Date().getTime() - KEYPRESS_DELAY - 1
     };

umd/index.dev.js

@@ -14649,7 +14649,7 @@ class SendMessage extends (react__WEBPACK_IMPORTED_MODULE_0___default().PureComp
       quote: null,
       message: '',
       audioRec: false,
-      audioAvailable: !!navigator.mediaDevices.getUserMedia,
+      audioAvailable: !!(navigator.mediaDevices && navigator.mediaDevices.getUserMedia),
       keypressTimestamp: new Date().getTime() - _config_js__WEBPACK_IMPORTED_MODULE_4__.KEYPRESS_DELAY - 1
     };
     this.handlePasteEvent = this.handlePasteEvent.bind(this);