PWGHF: further optimise HF combinatorial (AliceO2Group#4539)

* PWGHF: further optimise HF combinatorial

* Handle the case in which the D0 decay vtx is not computed

* Fix cast in filter

* Add missing condition in if statements

* Add also chi2 PCA cut for 2-track vertices for 3-prongs

* Two minor fixes

Author: fgrosa

PWGHF/DataModel/CandidateReconstructionTables.h

@@ -153,7 +153,7 @@ DECLARE_SOA_TABLE(HfSelCollision, "AOD", "HFSELCOLLISION", //!
 namespace hf_sel_track
 {
 DECLARE_SOA_COLUMN(IsSelProng, isSelProng, uint32_t); //!
-DECLARE_SOA_COLUMN(IsProton, isProton, int8_t);       //!
+DECLARE_SOA_COLUMN(IsProton, isProton, uint32_t);     //!
 DECLARE_SOA_COLUMN(IsPositive, isPositive, bool);     //!
 } // namespace hf_sel_track