Fix the previous patch, avoid potential deadlock.
Fix the previous patch, avoid potential deadlock.

Move the OSError handler up by one frame, and in the case
of fork() failure:

- don't increment host_con[]
- don't start progress meter

tradej/urlgrabber,Distrotech/urlgrabber,Distrotech/urlgrabber,henrysher/urlgrabber,tradej/urlgrabber,henrysher/urlgrabber,tradej/urlgrabber,oe-lite/urlgrabber,henrysher/urlgrabber,Distrotech/urlgrabber,oe-lite/urlgrabber,oe-lite/urlgrabber,Distrotech/urlgrabber,henrysher/urlgrabber,oe-lite/urlgrabber