Fix missing domain kwarg in pullback

Author: pbrubeck

ufl/pullback.py

@@ -348,7 +348,7 @@ def is_identity(self) -> bool:
         """Is this pull back the identity (or the identity applied to mutliple components)."""
         return False
 
-    def apply(self, expr):
+    def apply(self, expr, domain=None):
         """Apply the pull back.
 
         Args: