Additional protection (Alexander)

[u/mrichter/AliRoot.git] / STEER / AliSplineFit.cxx

diff --git a/STEER/AliSplineFit.cxx b/STEER/AliSplineFit.cxx
index 7e60c7790a624de60ceb15dfd8e1b7499fb178ff..ae375245c013d1951d4405a0e958ea9a7310b3ef 100644 (file)
--- a/STEER/AliSplineFit.cxx
+++ b/STEER/AliSplineFit.cxx
@@ -171,6 +171,7 @@ Double_t   AliSplineFit::Eval(Double_t x, Int_t deriv) const{
   //
   Double_t dx   = x-fX[index];
   Double_t dxc  = fX[index+1]-fX[index];
+  if (dxc<=0)    return 0;
   Double_t y0   = fY0[index];
   Double_t y1   = fY1[index];
   Double_t y01  = fY0[index+1];