Fix for ALFA_SimHitsTestTool (ATLASSIM-5034)
ALFA_SensitiveDetector
can make hits with plate==100
for GVS
volumes.
Usually 0<plate<10
. The hit plotting code in ALFA_SimHitsTestTool
assumes
a maximum value of 10 when it uses plate
as the index to arrays, so when a
hit with plate==100
is processed this ends up well outside the array and
corrupts the stack. The fix is to put the GVS
hits into a separate histogram,
skipping the stage where they are used as the index to an array.
Closes ATLASSIM-5034