Update CbmDigiData.h with FSD size getter.

core/data/base/CbmDigiData.h

@@ -90,6 +90,7 @@ public:
       case ECbmModuleId::kTof: return fTof.Size(); break;
       case ECbmModuleId::kPsd: return fPsd.Size(); break;
       case ECbmModuleId::kRich: return fRich.Size(); break;
+      case ECbmModuleId::kFsd: return fFsd.Size(); break;
       default: return 0; break;
     }
   }