kernel-shark: Use standard error message in KsMainWindow::_record()

The error message is printed using the method KsMainWindow::_error().
The message itself remains unchanged. If we want to change the message,
this can be done in another patch.

Link: http://lore.kernel.org/linux-trace-devel/20190920102852.22769-4-y.karadz@gmail.com

Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
1 file changed