fixed a lot of issues, now successfully runs the test with --enable-pedantic; refs #8

src/mrw/vector.hxx

@@ -73,7 +73,7 @@ template <typename T, typename A>
     throw(std::bad_exception) {
   std::vector<T, A> copy(l);
   copy.push_back(o);
-  return ;
+  return copy;
 }
 
 /* @brief push a char* to a vector of string