test on PSO changed.

eo/test/t-eoExtendedVelocity.cpp

@@ -59,7 +59,7 @@ int main_function(int argc, char **argv)
       for (unsigned int j = 0; j < VEC_SIZE; j++)
     		std::cout << " v" << j << "=" << pop[i].velocities[j] << std::endl;
     }
-	
+   	return EXIT_SUCCESS;
 }
 
 int main(int argc, char **argv)
@@ -72,5 +72,5 @@ int main(int argc, char **argv)
     {
         std::cout << "Exception: " << e.what() <<  " in t-eoExtendedVelocity" << std::endl;
     }
-
+    return EXIT_SUCCESS;
 }