Directory scanning bug fix/enhancement: MX_FINDFIRST/MX_FINDNEXT/MX_FINDEND sequences can now be nested. Previously, MX_FINDFIRST effectively executed an implicit MX_FINDEND to terminate the previous sequence, which could have led to a crash or other error if the interrupted sequence was then continued.
Although the documentation has always clearly stated that only one directory scan sequence can be in progress at the same time, the situation can arise in event-driven contexts, or within nested routines, where it is not possible for the local context to be aware of a scan in progress by the calling context, or vice versa. Nesting thus eliminates a cause of hard-to-debug application or system errors.
