Fix segv when switching from a call that was previously hungup.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@16432 d0543943-73ff-0310-b7d9-9358b9ac24b2

fscomm/call.h

@@ -49,6 +49,7 @@ class Call {
 public:
     Call();
     Call(int call_id, QString cid_name, QString cid_number, fscomm_call_direction_t direction, QString uuid);
+    /*~Call() { qDebug() << "I am being freed uuid: " << _uuid; }*/
     QString getCidName(void) { return _cid_name; }
     QString getCidNumber(void) { return _cid_number; }
     int getCallID(void) { return _call_id; }

fscomm/fshost.cpp

@@ -162,6 +162,15 @@ switch_status_t FSHost::processAlegEvent(switch_event_t * event, QString uuid)
 {
     switch_status_t status = SWITCH_STATUS_SUCCESS;
     QSharedPointer<Call> call = _active_calls.value(uuid);
+
+    if (call.isNull())
+    {
+        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "We don't have a call object for A leg on event %s.\n", switch_event_name(event->event_id));
+        qDebug() << _active_calls.keys();
+        printEventHeaders(event);
+        return SWITCH_STATUS_FALSE;
+    }
+
     /* Inbound call */
     if (call.data()->getDirection() == FSCOMM_CALL_DIRECTION_INBOUND)
     {
@@ -226,6 +235,15 @@ switch_status_t FSHost::processBlegEvent(switch_event_t * event, QString buuid)
     QString uuid = _bleg_uuids.value(buuid);
     switch_status_t status = SWITCH_STATUS_SUCCESS;
     QSharedPointer<Call> call = _active_calls.value(uuid);
+
+    if (call.isNull())
+    {
+        switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "We don't have a call object for B leg on event %s.\n", switch_event_name(event->event_id));
+        qDebug() << _active_calls.keys();
+        printEventHeaders(event);
+        return SWITCH_STATUS_FALSE;
+    }
+
     /* Inbound call */
     if (call.data()->getDirection() == FSCOMM_CALL_DIRECTION_INBOUND)
     {

fscomm/mainwindow.cpp

@@ -211,7 +211,9 @@ void MainWindow::callTableDoubleClick(QTableWidgetItem *item)
         return;
     }
     ui->hangupBtn->setEnabled(true);
-    lastCall.data()->setActive(false);
+    /* Last call was hungup and we are switching */
+    if (!lastCall.isNull())
+        lastCall.data()->setActive(false);
     call.data()->setActive(true);
 }