Add missing call to try_push_valid for nested avro deserialization

src/io/avro/read/deserialize.rs

@@ -160,6 +160,7 @@ fn deserialize_value<'a>(
                 let values = array.mut_values(index);
                 block = deserialize_item(values, *is_nullable, &field.schema, block)?;
             }
+            array.try_push_valid()?;
         }
         _ => match data_type.to_physical_type() {
             PhysicalType::Boolean => {

src/io/avro/read/nested.rs

@@ -230,6 +230,14 @@ impl DynMutableStructArray {
         self.values[field].as_mut()
     }
 
+    #[inline]
+    pub fn try_push_valid(&mut self) -> Result<()> {
+        if let Some(validity) = &mut self.validity {
+            validity.push(true)
+        }
+        Ok(())
+    }
+
     #[inline]
     fn push_null(&mut self) {
         self.values.iter_mut().for_each(|x| x.push_null());