Don't call resetwarnings(). Be more restrictive in what we filter out

instead.

Lib/test/test_scope.py

 from test_support import verify, TestFailed, check_syntax
 
 import warnings
-warnings.filterwarnings("ignore", "import *")
+warnings.filterwarnings("ignore", r"import \*", SyntaxWarning, "<string>")
 
 print "1. simple nesting"
 
@@ -491,8 +491,6 @@ except TypeError:
 else:
     print "exec should have failed, because code contained free vars"
 
-warnings.resetwarnings()
-
 print "21. list comprehension with local variables"
 
 try: