fixed issue with disk read cache not being cleared when removing torrents

src/disk_io_thread.cpp

@@ -1650,6 +1650,25 @@ namespace libtorrent
 						post_callback(i->second.callback, i->second, -3);
 						sorted_read_jobs.erase(i++);
 					}
+					jl.unlock();
+
+					mutex_t::scoped_lock l(m_piece_mutex);
+
+					for (cache_t::iterator i = m_read_pieces.begin();
+						i != m_read_pieces.end();)
+					{
+						if (i->storage == j.storage)
+						{
+							free_piece(*i, l);
+							i = m_read_pieces.erase(i);
+						}
+						else
+						{
+							++i;
+						}
+					}
+					l.unlock();
+					release_memory();
 					break;
 				}
 				case disk_io_job::abort_thread: