try fix m_set_bounds crash

src/i0mapmon.ui

@@ -164,7 +164,14 @@
      </property>
     </widget>
    </item>
-   <item row="0" column="4" colspan="5">
+   <item row="4" column="3">
+    <widget class="QPushButton" name="pbApplyWlens">
+     <property name="text">
+      <string>APPLY</string>
+     </property>
+    </widget>
+   </item>
+   <item row="0" column="0" colspan="9">
     <widget class="QLabel" name="lTitle">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
@@ -186,13 +193,6 @@
      </property>
     </widget>
    </item>
-   <item row="4" column="3">
-    <widget class="QPushButton" name="pbApplyWlens">
-     <property name="text">
-      <string>APPLY</string>
-     </property>
-    </widget>
-   </item>
   </layout>
  </widget>
  <layoutdefault spacing="6" margin="11"/>

src/i0mmonplot.cpp

@@ -111,7 +111,7 @@ void I0MMonPlot::onDataReady(const QList<CuData> &dl) {
         printf("\e[0;33mdata %s -- timestamp %f\e[0m\n", datos(da), x);
         for(int i = 0; i < m_lambda_idxs.size(); i++) {
             const QString curveName = QString("lambda %1").arg(m_lambda_idxs[i]);
-            if(m_lambda_idxs[i] < static_cast<int>(yv.size()) ) {
+            if(m_lambda_idxs[i] < static_cast<int>(yv.size()) && curve(curveName) != nullptr ) {
                 qDebug() << __PRETTY_FUNCTION__ << "APPENDING" << QDateTime::fromMSecsSinceEpoch(x) << yv[m_lambda_idxs[i]];
                 m_set_bounds(xv, yv, curve(curveName)->dataSize());
                 appendData(curveName, m_lambda_idxs[i], yv[m_lambda_idxs[i]]);