fix annotation call

Author: geooo109

sqlglot/optimizer/annotate_types.py

@@ -477,10 +477,12 @@ def _annotate_unary(self, expression: E) -> E:
         else:
             self._set_type(expression, expression.this.type)
 
-        if this_type := expression.this.type:
-            nonnull = this_type.args.get("nonnull")
-            if nonnull and (expr_type := expression.type):
-                expr_type.set("nonnull", nonnull)
+        if (
+            (this_type := expression.this.type)
+            and this_type.args.get("nonnull")
+            and (expr_type := expression.type)
+        ):
+            expr_type.set("nonnull", True)
 
         return expression