Fix check for processing state in crawl_directories_start().
Fix check for processing state in crawl_directories_start().

There could be no idle, but a directory being processed by the
crawler, so check first for this before trying to create another
idle function.

outofbits/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker