A slight change to SET_LINENO-less tracing.

This makes things a touch more like 2.2.  Read the comments in
Python/ceval.c for more details.
diff --git a/Lib/test/test_trace.py b/Lib/test/test_trace.py
index eca8c16..314801d 100644
--- a/Lib/test/test_trace.py
+++ b/Lib/test/test_trace.py
@@ -57,7 +57,7 @@
                       (3, 'line'),
                       (4, 'line'),
                       (2, 'line'),
-                      (6, 'return')]
+                      (2, 'return')]
 
 def no_pop_blocks():
     while 0: