sip: fix exception during class destructor

~SIPVoIPLink() calls handleEvents() but this method may throw.
Throwing during destructor is forbidden and result to and std::terminate().
Fix by try {} catch the call.

Detected by Coverity scan.

Change-Id: I57d742c7f6b6d872b4b2118c1f10c0986c082397

src/sip/sipvoiplink.cpp

@@ -609,7 +609,9 @@ SIPVoIPLink::~SIPVoIPLink()
 
     pjsip_tpmgr_set_state_cb(pjsip_endpt_get_tpmgr(endpt_), nullptr);
     Manager::instance().unregisterEventHandler((uintptr_t)this);
+    try {
         handleEvents();
+    } catch (...) {}
 
     sipTransportBroker.reset();