Invalid is_in_any_VTMS_transition() check in post_dynamic_code_generated_while_holding_locks

Method post_dynamic_code_generated_while_holding_locks()
register stubs and might be called during VTMT transitions.
At least it is called in tmp VTMT transition, and stubs might be generated during standard VTMT transition.

The method doesn't post event bug just register stub for later posting so it might be called during transition.