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zero events selected by Charm_D0Tohhpi0 HLT2 lines

It was noticed that in recent bandwidth tests the number of selected events by lines Hlt2Charm_DstpToD0Pip_D0ToPimPipPi0_R and Hlt2Charm_DstpToD0Pip_D0ToPimPipPi0_M went from non-zero to zero.

The issue seems to be with the CompositeCut in Charm_D0Tohhpi0_D0ToRho0Pi0_R, which combines a pi0 with a pipi candidate.

Before:

Charm_D0Tohhpi0_D0ToRho0Pi0_R          INFO Number of counters : 7
 |    Counter                                      |     #     |    sum     | mean/eff^* | rms/err^*  |     min     |     max     |
 |*"# passed"                                      |      7218 |        255 |( 3.532835 +- 0.2172916)% |
 |*"# passed CombinationCut"                       |      6003 |        304 |( 5.064135 +- 0.2829982)% |
 |*"# passed CompositeCut"                         |       304 |        288 |( 94.73684 +- 1.280695)% |
 |*"# passed vertex fit"                           |       304 |        304 |( 100.0000 +- 0.000000)% |
 | "Input1 size"                                   |      7218 |       8509 |     1.1789 |
 | "Input2 size"                                   |      7218 |       4957 |    0.68676 |
 | "candidate multiplicity"                        |       255 |        288 |     1.1294 |    0.38972 |      1.0000 |      4.0000 |

Current:

Charm_D0Tohhpi0_D0ToRho0Pi0_R          INFO Number of counters : 6
 |    Counter                                      |     #     |    sum     | mean/eff^* | rms/err^*  |     min     |     max     |
 |*"# passed"                                      |      7218 |          0 |( 0.000000 +- 0.000000)% |
 |*"# passed CombinationCut"                       |      6003 |        304 |( 5.064135 +- 0.2829982)% |
 |*"# passed CompositeCut"                         |       304 |          0 |( 0.000000 +- 0.000000)% |
 |*"# passed vertex fit"                           |       304 |        304 |( 100.0000 +- 0.000000)% |
 | "Input1 size"                                   |      7218 |       8509 |     1.1789 |
 | "Input2 size"                                   |      7218 |       4957 |    0.68676 |

cc @aanelli @gtuci @totodoro