[ROOT-9737] [DF] Cannot use fill if the object is not an histogram - SFTJIRA

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As reported here https://root-forum.cern.ch/t/rdataframe-fill-action/31211 this code does not compile. The static assert has to be removed.

#include <TROOT.h>

#include <ROOT/RDataFrame.hxx>

#include <ROOT/RVec.hxx>

#include <TH1F.h>

class Test

    TH1F hist;

public:

    void Fill(const int val)

        hist.Fill(val);

};

int main()

    const std::string file = "myfile.root";

    auto df = ROOT::RDataFrame("Events", file);

    auto something = df.Fill(Test(), {"nMuon"});

    return 0;