Fix GHOST 2.0 parsing mask dimensions

ghost_runtime.py

@@ -172,7 +172,7 @@ class Ghost2Engine:
         mask = torch.zeros_like(parsing, dtype=torch.float32)
         for index in range(1, 21):
             mask[parsing == index] = 1.0
-        return mask[0]
+        return mask[0, 0] if mask.ndim == 4 else mask[0]
 
     def _process(self, frame: np.ndarray, target: bool = False):
         faces = self.detector.get(frame)