Dielectron em efficiency task

[rbailhac]

Dielectron em efficiency task with resolution map, single electron efficiency and dielectron efficiency

[alibuild]

Error while checking build/O2Physics/o2 for 836b423 at 2022-07-14 22:32:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/997-slc7_x86-64/0/PWGEM/Dilepton/Tasks/emEfficiencyEE.cxx:544:26: error: comparison of integer expressions of different signedness: 'int' and 'std::vector<MCSignal>::size_type' {aka 'long unsigned int'} [-Werror=sign-compare]
/sw/SOURCES/O2Physics/997-slc7_x86-64/0/PWGEM/Dilepton/Tasks/emEfficiencyEE.cxx:554:31: error: comparison of integer expressions of different signedness: 'int' and 'std::vector<MCSignal>::size_type' {aka 'long unsigned int'} [-Werror=sign-compare]
ninja: build stopped: subcommand failed.

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for 4b57647 at 2022-07-15 02:12:

## sw/BUILD/O2Physics-latest/log
/sw/SOURCES/O2Physics/997-slc7_x86-64/0/PWGEM/Dilepton/Tasks/emEfficiencyEE.cxx:515:33: error: comparison of integer expressions of different signedness: 'int' and 'std::vector<MCSignal>::size_type' {aka 'long unsigned int'} [-Werror=sign-compare]
/sw/SOURCES/O2Physics/997-slc7_x86-64/0/PWGEM/Dilepton/Tasks/emEfficiencyEE.cxx:525:31: error: comparison of integer expressions of different signedness: 'int' and 'std::vector<MCSignal>::size_type' {aka 'long unsigned int'} [-Werror=sign-compare]
ninja: build stopped: subcommand failed.

Full log here.

[dsekihat]

+1