ITS: fix correctForMaterial arg for actual layer

Signed-off-by: Felix Schlepper <felix.schlepper@cern.ch>

Author: f3sch

Detectors/ITSMFT/ITS/tracking/GPU/cuda/TrackingKernels.cu

@@ -505,7 +505,7 @@ GPUg() void __launch_bounds__(256, 1) computeLayerCellsKernel(
             break;
           }
 
-          if (!track.correctForMaterial(layerxX0[layer + iC], layerxX0[layer] * constants::Radl * constants::Rho, true)) {
+          if (!track.correctForMaterial(layerxX0[layer + iC], layerxX0[layer + iC] * constants::Radl * constants::Rho, true)) {
             break;
           }
 

Detectors/ITSMFT/ITS/tracking/src/TrackerTraits.cxx

@@ -357,7 +357,7 @@ void TrackerTraits<nLayers>::computeLayerCells(const int iteration)
               break;
             }
 
-            if (!track.correctForMaterial(mTrkParams[0].LayerxX0[iLayer + iC], mTrkParams[0].LayerxX0[iLayer] * constants::Radl * constants::Rho, true)) {
+            if (!track.correctForMaterial(mTrkParams[0].LayerxX0[iLayer + iC], mTrkParams[0].LayerxX0[iLayer + iC] * constants::Radl * constants::Rho, true)) {
               break;
             }