LArRawChannel bugfix

Bugfix to ensure correct indices while looping over shape derivative in case of non-zero firstSample. This fix should not change any of the standard MC outputs.

LArCalorimeter/LArROD/python/LArNNChannelBuilder.py

@@ -59,4 +59,4 @@ def LArNNRawChannelBuilderCfg(configFlags, name="LArNNRawChannelBuilder", **kwar
        
         acc.addEventAlgo(CompFactory.LArNNRawChannelBuilder(name, **kwargs))
 
-    return acc
\ No newline at end of file
+    return acc