Restore test task setup

This is needed in order for the test runner to continue on failure, and I
don't see that it causes any problems.

src/lib/test.rs

@@ -336,16 +336,13 @@ fn run_test(test: &test_desc, to_task: &test_to_task) -> test_future {
 // we've got to treat our test functions as unsafe pointers.  This function
 // only works with functions that don't contain closures.
 fn default_test_to_task(f: &fn()) -> task_id {
-    /*
     fn run_task(fptr: *mutable fn() ) {
         configure_test_task();
         // Run the test
         (*fptr)()
     }
     let fptr = ptr::addr_of(f);
-    */
-    //ret task::_spawn(bind run_task(fptr));
-    task::spawn(f)
+    ret task::spawn(bind run_task(fptr));
 }
 
 // Call from within a test task to make sure it's set up correctly