Merge pull request #837 from reaperhulk/reaperhulk-patch-1

Support Python 3.3.0 for extension suffix

setuptools/command/build_ext.py

@@ -109,7 +109,7 @@ class build_ext(_build_ext):
                 and get_abi3_suffix()
             )
             if use_abi3:
-                so_ext = get_config_var('EXT_SUFFIX')
+                so_ext = get_config_var('EXT_SUFFIX') or get_config_var('SO')
                 filename = filename[:-len(so_ext)]
                 filename = filename + get_abi3_suffix()
             if isinstance(ext, Library):