Minor strict type fixes

Author: richvdh

src/components/views/right_panel/EncryptionPanel.tsx

@@ -71,7 +71,11 @@ const EncryptionPanel: React.FC<IProps> = (props: IProps) => {
     }, [verificationRequestPromise]);
     const changeHandler = useCallback(() => {
         // handle transitions -> cancelled for mismatches which fire a modal instead of showing a card
-        if (request && request.phase === VerificationPhase.Cancelled && MISMATCHES.includes(request.cancellationCode)) {
+        if (
+            request &&
+            request.phase === VerificationPhase.Cancelled &&
+            MISMATCHES.includes(request.cancellationCode ?? "")
+        ) {
             Modal.createDialog(ErrorDialog, {
                 headerImage: require("../../../../res/img/e2e/warning-deprecated.svg").default,
                 title: _t("Your messages are not secure"),

src/components/views/toasts/VerificationRequestToast.tsx

@@ -42,6 +42,7 @@ interface IProps {
 }
 
 interface IState {
+    /** number of seconds left in the timeout counter. Zero if there is no timeout. */
     counter: number;
     device?: DeviceInfo;
     ip?: string;
@@ -52,7 +53,7 @@ export default class VerificationRequestToast extends React.PureComponent<IProps
 
     public constructor(props: IProps) {
         super(props);
-        this.state = { counter: Math.ceil(props.request.timeout / 1000) };
+        this.state = { counter: Math.ceil((props.request.timeout ?? 0) / 1000) };
     }
 
     public async componentDidMount(): Promise<void> {