Use a forward declaration of TList instead of including TList.h

g3d/src/TAxis3D.cxx

ged/inc/TGedEditor.h

ged/src/TFunctionParametersDialog.cxx

hist/inc/TAxis.h

hist/inc/TF1.h

hist/inc/TH1.h

hist/src/TAxis.cxx

hist/src/TF1.cxx

hist/src/TH1.cxx

hist/src/TH2.cxx

hist/src/TH3.cxx

hist/src/THStack.cxx

hist/src/TProfile.cxx

hist/src/TProfile2D.cxx

hist/src/TProfile3D.cxx

main/src/hadd.cxx

proof/src/TSessionViewer.cxx

sessionviewer/src/TSessionViewer.cxx

spectrum/src/TSpectrum.cxx

spectrum/src/TSpectrum2.cxx