Merge pull request #1 from hieule0207Zigvy/bugfix/fix-crash-useSessionCall

handle return null when null sessionId

Author: vanbui1995

src/sip-provider/SIPProviderContext.ts

@@ -23,6 +23,7 @@ export const useSIPProvider = () => {
 };
 
 export const useSessionCall = (sessionId: string) => {
+  if (!sessionId) return null;
   const { sessions, sessionManager, sessionTimer } = useSIPProvider();
   const session = sessions[sessionId];