Fix pp_comparison segfault

This MR disable the GEC_passthrough line that is causing a segfault in the pp_comparison test.

The problem is that when this line triggers, it require other lines to be evaluated, even if the event doesn't have any PV, causing a segfault in the lines that requires PVs to run.

Thanks to @olupton for the debugging.

FYI @sstahl @apearce

Hlt/Hlt1Conf/python/Hlt1Conf/settings.py

@@ -81,5 +81,5 @@ def comparison_lines():
         no_bias_line(),
         luminosity_line(),
         one_track_muon_highpt_line(),
-        gec_passthrough_line()
+        #gec_passthrough_line()
     ]