make: Fix non-fatal contrib download error.

Author: bradleysepos

make/df-fetch.py

@@ -108,7 +108,7 @@ def _run(self, error):
         ## create URL objects and keep active
         urls = []
         i = 0
-        for arg in self.args:
+        for arg in self.args[1:]:
             url = URL(arg, i)
             if url.active:
                 urls.append(url)