fix TPCFlagsMemberCustomStreamer.cxx

Author: alcaliva

Detectors/TPC/base/src/TPCFlagsMemberCustomStreamer.cxx

@@ -74,13 +74,13 @@ static __attribute__((used)) int _R__dummyStreamer_3 =
     auto cl = TClass::GetClass<o2::tpc::CalArray<o2::tpc::PadFlags>>();
     if (cl) {
       if (!getenv("TPC_PADFLAGS_STREAMER_OFF")) {
-        cl->AdoptMemberStreamer("mData", new TMemberStreamer(MemberVectorPadFlagsStreamer));
+        cl->AdoptMemberStreamer(
+          "mData",
+          new TMemberStreamer(MemberVectorPadFlagsStreamer));
       }
-    } else {
-      // we should never come here ... and if we do we should assert/fail
-      assert(false);
     }
+    // If cl == nullptr, just do nothing (dictionary not loaded yet)
     return 0;
   })();
 } // namespace ROOT
-#endif
+#endif