use total_wanted instead of total_size in checking free space

TODO

@@ -1,6 +1,2 @@
 for 0.5.6
-    1.  check on file size warnings "you do not have enough disk space blah blah"
-        and see how it works with the new sparse mode.  use total_wanted.
-    2.  for the love of all that is pure and holy, figure out why speed limiter
-        doesnt work anymore
-    3.  make scheduled plugin work without having to open up its preferences first
+    1.  make scheduled plugin work without having to open up its preferences first

src/core.py

@@ -542,7 +542,7 @@ class Manager:
                 if self.unique_IDs[unique_ID].compact == False:
                     avail = self.calc_free_space(directory = self.unique_IDs\
                         [unique_ID].save_dir)
-                    total_needed = torrent_state["total_size"] - torrent_state["total_done"]
+                    total_needed = torrent_state["total_wanted"] - torrent_state["total_done"]
                     if total_needed < avail:
                         # We have enough free space, so lets resume this torrent
                         self.resume(unique_ID)