[PATCH 4 of 7] patch: drop internalpatch checks for NoHunks

[Benoît Allard]

Just my two cents:

Benoit Boissinot wrote:
> The idea is that if someone tries to patch something and we don't
> detect any changes, then it *must* be a bug.
> The fallback to externalpatcher in that case was a bad idea (and I
> tried to removed it), but I think it's better to be safe.
> 

Isn't this part of a normal mq workflow ? I can think of scenarii where 
I have empty mq patches: qnew without -f is one of them.

Regards,
Benoit
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