Add type hint for default.hostapi

Author: mgeier

sounddevice.py

@@ -2229,10 +2229,12 @@ def _default_device(self):
                 _lib.Pa_GetDefaultOutputDevice())
 
     @property
-    def hostapi(self):
+    def hostapi(self):  # type: ignore
         """Index of the default host API (read-only)."""
         return _check(_lib.Pa_GetDefaultHostApi())
 
+    hostapi: int
+
     def reset(self):
         """Reset all attributes to their "factory default"."""
         vars(self).clear()