Fix a typo in SLOT0 macro for the declaration of cache_str. Dunno why I didn't catch this before.
Fix a typo in SLOT0 macro for the declaration of cache_str.
Dunno why I didn't catch this before.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator