generic-tracing: fix lossage of first event

When using the generic-tracing experiment for generating a trace, the
first event, after the tracing is started (the start-symbol) is lost
in the trace. This patch handles this special case seperately.

Change-Id: Ia131a8559d67161532504160826fdb100247ed75

src/experiments/generic-tracing/experiment.cc

@@ -209,6 +209,10 @@ bool GenericTracing::run()
 	// this must be done *after* configuring the plugin:
 	simulator.addFlow(&tp);
 
+    // In order to not loose the IP event at the beginning of the
+    // trace, we have to handle the IP event manually
+    tp.handleSingleIP(l_start_symbol);
+
 	////////////////////////////////////////////////////////////////
 	// STEP 2: continue to the save point, and save state
 	if (start_symbol != save_symbol) {