rust/vmstate: Fix num_offset in vmstate macros

`num_offset` is a member of `VMStateField`, and there's no need to use
"." to access this field in a `VMStateField` instance.

Signed-off-by: Zhao Liu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Paolo Bonzini <[email protected]>

Author: trueptolemy

rust/qemu-api/src/vmstate.rs

@@ -208,7 +208,7 @@ macro_rules! vmstate_of {
                 .as_bytes()
                 .as_ptr() as *const ::std::os::raw::c_char,
             offset: $crate::offset_of!($struct_name, $field_name),
-            $(.num_offset: $crate::offset_of!($struct_name, $num),)?
+            $(num_offset: $crate::offset_of!($struct_name, $num),)?
             // The calls to `call_func_with_field!` are the magic that
             // computes most of the VMStateField from the type of the field.
             info: $crate::info_enum_to_ref!($crate::call_func_with_field!(
@@ -440,7 +440,7 @@ macro_rules! vmstate_struct {
             name: ::core::concat!(::core::stringify!($field_name), "\0")
                 .as_bytes()
                 .as_ptr() as *const ::std::os::raw::c_char,
-            $(.num_offset: $crate::offset_of!($struct_name, $num),)?
+            $(num_offset: $crate::offset_of!($struct_name, $num),)?
             offset: {
                 $crate::assert_field_type!($struct_name, $field_name, $type);
                 $crate::offset_of!($struct_name, $field_name)