Index: trunk/Mars/msim/MPhotonData.cc
===================================================================
--- trunk/Mars/msim/MPhotonData.cc	(revision 18449)
+++ trunk/Mars/msim/MPhotonData.cc	(revision 18459)
@@ -63,5 +63,5 @@
     : fPosX(0), fPosY(0), fCosU(0), fCosV(0), fTime(0), fWavelength(0),
     /*fNumPhotons(1),*/ fProductionHeight(0), fPrimary(MMcEvtBasic::kUNDEFINED),
-      fTag(-1), fWeight(1), fMirrorTag(-1)
+      fTag(-1), fMirrorTag(-1), fWeight(1)
 {
    // fName  = name  ? name  : "MPhotonData";