Incorrect code was generated for:

  foo(a = i for i in range(10))

This should have generated a SyntaxError.  Fix the Grammar so
it raises a SyntaxError and test it.
diff --git a/Misc/NEWS b/Misc/NEWS
index 77e8569..36d5c45 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and builtins
 -----------------
 
+- SF bug #116775: fix incorrect code being for generator expressions.
+  The following code now raises a SyntaxError:  foo(a = i for i in range(10))
+
 - SF Bug #976608: fix SystemError when mtime of an imported file is -1.
 
 - SF Bug #887946: fix segfault when redirecting stdin from a directory.