adapt to set -e

component/proviewR/buildout.cfg

@@ -369,10 +369,9 @@ depends =
 #  ${xserver:location}/bin/Xvfb -noreset +extension GLX +extension RANDR +extension RENDER :99 &  
 
 pre-build =
-  PID=`pgrep -u "$(whoami)" -f -x  '${xserver:location}/bin/Xorg.*'`
+  PID=`pgrep -u "$(whoami)" -f -x  '${xserver:location}/bin/Xorg.*'` || true #pgrep returns 1 on notfound
   echo 'I GOT THROUGH PID'
   echo " PID is $PID "
-  echo "other possibly different PID is `pgrep -f vfb` "
   echo "my own process is $$"
   echo "my command name is `ps -ly $$`"  
   if [ ! -z "$PID" ]; then kill -TERM $PID; fi