fix warning for Python 2.5

git-svn-id: http://simplejson.googlecode.com/svn/trunk@31 a4795897-2c25-0410-b006-0d3caba88fa1

simplejson/scanner.py

@@ -3,7 +3,7 @@
 """
 import sre_parse, sre_compile, sre_constants
 from sre_constants import BRANCH, SUBPATTERN
-from sre import VERBOSE, MULTILINE, DOTALL
+from re import VERBOSE, MULTILINE, DOTALL
 import re
 
 __all__ = ['Scanner', 'pattern']