[PWGDQ] small fix in MC particle association check

Author: aferrero2707

PWGDQ/Tasks/mftMchMatcher.cxx

@@ -549,7 +549,7 @@ struct mftMchMatcher {
     auto const& mchTrack = muonTrack.template matchMCHTrack_as<TMUONS>();
     auto const& mftTrack = muonTrack.template matchMFTTrack_as<TMFTS>();
 
-    if (!muonTrack.has_mcParticle() || !mftTrack.has_mcParticle()) {
+    if (!mchTrack.has_mcParticle() || !mftTrack.has_mcParticle()) {
       // if either the MCH or the MFT tracks are fakes (not associated to any MC particles)
       // we consider the match as fake
       return (isBestMatch ? kMatchTypeFakeLeading : kMatchTypeFakeNonLeading);