Remove check that would never succeed, because svn_utils always returns an...

Remove check that would never succeed, because svn_utils always returns an integer and get_svn_revision always returns a non-empty string.

setuptools/command/egg_info.py

@@ -186,9 +186,7 @@ class egg_info(Command):
         if self.tag_build:
             version += self.tag_build
         if self.tag_svn_revision:
-            rev = self.get_svn_revision()
-            if rev:     # is 0 if it's not an svn working copy
-                version += '-r%s' % rev
+            version += '-r%s' % self.get_svn_revision()
         if self.tag_date:
             import time