PWGLF: fix typo when setting seeds (#1799)

* fix typo

* fix typo 2

* fix typo 3

Author: ddobrigk

MC/config/PWGLF/pythia8/generator_pythia8_extraStrangeness.C

@@ -280,7 +280,7 @@ private:
  {
   auto generator = new GeneratorPythia8ExtraStrangeness();
   gRandom->SetSeed(0);
-  generator.readString("Random:setSeed = on");
-  generator.readString("Random:seed =" + std::to_string(gRandom->Integer(900000000 - 2) + 1));
+  generator->readString("Random:setSeed = on");
+  generator->readString("Random:seed =" + std::to_string(gRandom->Integer(900000000 - 2) + 1));
   return generator;
  }

MC/config/PWGLF/pythia8/generator_pythia8_syntheFlow.C

@@ -101,7 +101,7 @@ private:
  {
   auto generator = new GeneratorPythia8SyntheFlow();
   gRandom->SetSeed(0);
-  generator.readString("Random:setSeed = on");
-  generator.readString("Random:seed =" + std::to_string(gRandom->Integer(900000000 - 2) + 1));
+  generator->readString("Random:setSeed = on");
+  generator->readString("Random:seed =" + std::to_string(gRandom->Integer(900000000 - 2) + 1));
   return generator;
  }

MC/config/PWGLF/pythia8/generator_pythia8_syntheFlowXi.C

@@ -337,7 +337,7 @@ private:
  {
   auto generator = new GeneratorPythia8SyntheFlowXi();
   gRandom->SetSeed(0);
-  generator.readString("Random:setSeed = on");
-  generator.readString("Random:seed =" + std::to_string(gRandom->Integer(900000000 - 2) + 1));
+  generator->readString("Random:setSeed = on");
+  generator->readString("Random:seed =" + std::to_string(gRandom->Integer(900000000 - 2) + 1));
   return generator;
  }