Fix segfault in std::swap with SoA tracks

Author: OliverRietmann

GPU/GPUTracking/SectorTracker/GPUTPCBaseTrackParam.h

@@ -109,11 +109,10 @@ struct GPUTPCBaseTrackParamSkeleton
 
 // Needed for sorting
 constexpr void swap(GPUTPCBaseTrackParamSkeleton<MemLayout::reference> a, GPUTPCBaseTrackParamSkeleton<MemLayout::reference> b) {
-    using std::swap;
-    swap(a.mX, b.mX);
-    swap(a.mC, b.mC);
-    swap(a.mZOffset, b.mZOffset);
-    swap(a.mP, b.mP);
+    std::swap(a.mX, b.mX);
+    std::swap(a.mC, b.mC);
+    std::swap(a.mZOffset, b.mZOffset);
+    std::swap(a.mP, b.mP);
 }
 
 using GPUTPCBaseTrackParam = MemLayout::wrapper<GPUTPCBaseTrackParamSkeleton, MemLayout::value>;

GPU/GPUTracking/SectorTracker/GPUTPCTrack.h

@@ -61,10 +61,9 @@ class GPUTPCTrackSkeleton
 
 // Needed for sorting
 constexpr void swap(GPUTPCTrackSkeleton<MemLayout::reference> a, GPUTPCTrackSkeleton<MemLayout::reference> b) {
-    using std::swap;
-    swap(a.mFirstHitID, b.mFirstHitID);
-    swap(a.mNHits, b.mNHits);
-    swap(a.mLocalTrackId, b.mLocalTrackId);
+    std::swap(a.mFirstHitID, b.mFirstHitID);
+    std::swap(a.mNHits, b.mNHits);
+    std::swap(a.mLocalTrackId, b.mLocalTrackId);
     swap(a.mParam, b.mParam);
 }