The previous commit removed the only user of QAPIGen(None).  Tighten
the type hint.

Signed-off-by: Markus Armbruster <arm...@redhat.com>
Signed-off-by: John Snow <js...@redhat.com>
Message-Id: <20210201193747.2169670-15-js...@redhat.com>
---
 scripts/qapi/gen.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/qapi/gen.py b/scripts/qapi/gen.py
index a0a5df333e..ac3d3e687e 100644
--- a/scripts/qapi/gen.py
+++ b/scripts/qapi/gen.py
@@ -40,7 +40,7 @@ from .source import QAPISourceInfo
 
 
 class QAPIGen:
-    def __init__(self, fname: Optional[str]):
+    def __init__(self, fname: str):
         self.fname = fname
         self._preamble = ''
         self._body = ''
@@ -125,7 +125,7 @@ def build_params(arg_type: Optional[QAPISchemaObjectType],
 
 
 class QAPIGenCCode(QAPIGen):
-    def __init__(self, fname: Optional[str]):
+    def __init__(self, fname: str):
         super().__init__(fname)
         self._start_if: Optional[Tuple[List[str], str, str]] = None
 
-- 
2.26.2


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