qml: fix abort in ChainModel::setCurrentTimeRatio

Author: johnny9

src/qml/chainmodel.cpp

@@ -74,7 +74,14 @@ void ChainModel::setCurrentTimeRatio()
     double current_time_ratio = double(secs_since_meridian) / SECS_IN_12_HOURS;
 
     if (current_time_ratio < m_time_ratio_list[0].toDouble()) { // That means time has crossed a meridian
-        m_time_ratio_list.erase(m_time_ratio_list.begin() + 2, m_time_ratio_list.end());
+        m_time_ratio_list.clear();
     }
-    m_time_ratio_list[0] = current_time_ratio;
+
+    if (m_time_ratio_list.isEmpty()) {
+        m_time_ratio_list.push_back(current_time_ratio);
+        m_time_ratio_list.push_back(0);
+    } else {
+        m_time_ratio_list[0] = current_time_ratio;
+    }
+    Q_EMIT timeRatioListChanged();
 }