#1 trace_tree bug

[Bryce Harrington]

In trace_tree, the line numbers are reported somewhat
incorrectly:

Trace:
+ _top_():
+ Eidetic::main() [docsys.cgi @ 103]:
+ Eidetic::handleError() [Eidetic.pm @ 3988]:
+ Eidetic::sendto_screen() [Eidetic.pm @ 3129]:

The line numbers given really should be moved a line up,
like this:

Trace:
+ _top_() [docsys.cgi @ 103]:
+ Eidetic::main() [Eidetic.pm @ 3988]:
+ Eidetic::handleError() [Eidetic.pm @ 3129]:
+ Eidetic::sendto_screen()