Minor compilation fixes (Kostas Oikonomou) (Solaris?).

git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@581 bbc10eb1-c90d-0410-af57-cb519fbb1720

prism/src/simulator/SimulatorEngine.cc

@@ -213,6 +213,7 @@ JNIEXPORT jint JNICALL Java_simulator_SimulatorEngine_allocatePath
 		cout << str << endl;
 		return simulator_SimulatorEngine_ERROR;
 	}
+	return 0;
 }
 
 
@@ -229,7 +230,8 @@ JNIEXPORT jint JNICALL Java_simulator_SimulatorEngine_startPath
 	{
 		cout << str << endl;
 		return simulator_SimulatorEngine_ERROR;
-	}  
+	}
+	return 0;
 }