[VECGEOM-323] redefine EInside enumeration
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the old enumeration starting from 0 caused compilation problems under some circumstances (Intel + UMESIMD) because 0 was interpreted as nullptr
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this trivial redefinition avoids such problems
the old enumeration starting from 0 caused compilation problems under some circumstances (Intel + UMESIMD) because 0 was interpreted as nullptr
this trivial redefinition avoids such problems