typo in warning message

src/setuptools_dso/__init__.py

@@ -42,7 +42,7 @@ def setup(**kws):
                 raise AssertionError("cmdclass[%s] must be subclass of %s" % (cmdclass[name], klass))
             else:
                 log.warn("cmdclass[%s] must be subclass of %s, setuptools-dso functionality may be lost",
-                         cmdclass[name], klas)
+                         cmdclass[name], klass)
     cmdclass_setdefault('bdist_egg', bdist_egg)
     cmdclass_setdefault('build_dso', build_dso)
     cmdclass_setdefault('build_ext', build_ext)