Add tests and fix for marshal.load of pyc files on Python 3.3

Fixes
https://bitbucket.org/tarek/distribute/issue/283/bdist_egg-issues-with-python-330ax

--HG--
branch : distribute
extra : rebase_source : ec6f2611d3f8a54b7e11cfadf9d03fdcdef39639

setuptools/command/bdist_egg.py

@@ -426,6 +426,10 @@ def scan_module(egg_dir, base, name, stubs):
     pkg = base[len(egg_dir)+1:].replace(os.sep,'.')
     module = pkg+(pkg and '.' or '')+os.path.splitext(name)[0]
     f = open(filename,'rb'); f.read(8)   # skip magic & date
+    try:
+        code = marshal.load(f); f.close()
+    except ValueError:
+        f.seek(0); f.read(12)  # skip magic & date & file size; file size added in Python 3.3
         code = marshal.load(f); f.close()
     safe = True
     symbols = dict.fromkeys(iter_symbols(code))

tests/python3.3_bdist_egg_test/setup.py

+from setuptools import setup
+
+setup(
+    name='python3.3_bdist_egg_test',
+    version='0.0.0',
+    description='Test',
+    license='BSD',
+    py_modules=['module'],
+    author='Marc Abramowitz',
+    author_email='marc@marc-abramowitz.com',
+    url='https://bitbucket.org/msabramo/python3.3_bdist_egg_test',
+    # zip_safe=False,
+)