Fixed the free call in the test.

oelements stores longs which need to be converted to pointers before freeing.
Previously we actually free the entries of the array oelements and not the
stored pointers.

dune/common/test/poolallocatortest.cc

@@ -93,7 +93,7 @@ struct testPoolMain
 
 
     for(int i=0; i < elements*10; ++i)
-      pool.free(reinterpret_cast<T*>(oelements+i));
+      pool.free(reinterpret_cast<void*>(oelements[i]));
     delete[] oelements;
 
     return ret;