Fixed segmentation fault when executing command: open tcurve /new

xtt/lib/ge/qt/ge_curve_qt.cqt

@@ -936,6 +936,7 @@ GeCurveQt::GeCurveQt(void* gc_parent_ctx, QWidget* parent_widget,
   wow = new CoWowQt(toplevel);
 
   timebox_timecombo->setCurrentIndex(2);
+  toplevel->activate_timecombo(2);
 
   if (!(options & curve_mOptions_Embedded)) {
     if (options & curve_mOptions_FullScreen) {

xtt/lib/ge/src/ge_curve.cpp

@@ -1358,7 +1358,9 @@ int GeCurve::configure_axes()
   grow_ResetNodraw(growaxis_ctx);
   grow_Redraw(growaxis_ctx);
 
-  update_times_markers();
+  if (cd->x_data[0]) {
+    update_times_markers();
+  }
   return 1;
 }
 

xtt/lib/xtt/qt/xtt_tcurve_qt.cpp

@@ -87,10 +87,11 @@ XttTCurveQt::XttTCurveQt(void* parent_ctx, QWidget* parent_wid,
 
 XttTCurveQt::~XttTCurveQt()
 {
-  debug_print("XttTCurveQt::~XttTCurveQt\n");
   timerid->remove();
 
+  delete curve;
   if (gcd) {
     delete gcd;
   }
+  delete wow;
 }
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