added type hint for mypyc

Author: randolf-scholz

mypy/checkexpr.py

@@ -5891,7 +5891,7 @@ def check_for_comp(self, e: GeneratorExpr | DictionaryComprehension) -> None:
 
     def visit_conditional_expr(self, e: ConditionalExpr, allow_none_return: bool = False) -> Type:
         self.accept(e.cond)
-        ctx = self.type_context[-1]
+        ctx: Type | None = self.type_context[-1]
 
         # Gain type information from isinstance if it is there
         # but only for the current expression