Avoid crash in hadd (see https://savannah.cern.ch/bugs/?92486) when the resulting TTree is longer than the AutoSave length *and* the TFileMerger needs to handle the input files in more than one pass for example when there is more than 1000 input files or the -n option is passed to hadd (This result in needed to loop over the keys of the output file (for the 2nd set of input files and requires those keys to not be deleted during the merging)
Avoid crash in hadd (see https://savannah.cern.ch/bugs/?92486) when the resulting TTree is longer than the AutoSave length *and* the TFileMerger needs to handle the input files in more than one pass for example when there is more than 1000 input files or the -n option is passed to hadd (This result in needed to loop over the keys of the output file (for the 2nd set of input files and requires those keys to not be deleted during the merging)


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@43357 27541ba8-7e3a-0410-8455-c3a389f83636

bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT