Protected against failures in tarfile extraction, as we use a private method...

Protected against failures in tarfile extraction, as we use a private method which can raise those. Patch as per PJE's setuptools trunk commit r65946. This closes #10.

--HG--
branch : distribute
extra : rebase_source : c621c9d165d820c32bc08d9a9a168074842e3d66

setuptools/archive_util.py

@@ -189,7 +189,10 @@ def unpack_tarfile(filename, extract_dir, progress_filter=default_filter):
                     if dst:
                         if dst.endswith(os.sep):
                             dst = dst[:-1]
-                        tarobj._extract_member(member,dst)  # XXX Ugh
+                        try:
+                            tarobj._extract_member(member,dst)  # XXX Ugh
+                        except tarfile.ExtractError:
+                            pass    # chown/chmod/mkfifo/mknode/makedev failed
         return True
     finally:
         tarobj.close()