trace: fix crash on empty channel name in popup form

sr_dev_channel_name_set returns SR_ERR_ARG when a channel name is
empty and pulseview crashes once user deletes all characters from
a channel name in trace popup form.

This patch forbids to set empty channel name and keeps last non-empty
name provided by user.

diff --git a/pv/views/trace/trace.cpp b/pv/views/trace/trace.cpp
index 1f77598d609c04235dfb3d0e3282b693edf6ee32..ce935280abcf1f97e0adf485f580bf4b2da708be 100644 (file)
--- a/pv/views/trace/trace.cpp
+++ b/pv/views/trace/trace.cpp
@@ -442,7 +442,8 @@ void Trace::on_popup_closed()
 void Trace::on_nameedit_changed(const QString &name)
 {
        /* This event handler notifies SignalBase that the name changed */
-       base_->set_name(name);
+       if(!name.isEmpty())
+               base_->set_name(name);
 }
 
 void Trace::on_coloredit_changed(const QColor &color)