[patch] move htab_iterator

[Andrew MacLeod]

Jakub didn't like removing this hash table iterator functionality even 
though it is currently unused in the compiler.

So it seems reasonable to put it in tree-hasher.h since its purpose is 
"Hash Table Helper for Trees"?

bootstraps on build/x86_64-unknown-linux-gnu with no new regressions.   OK?

Andrew
-------------- next part --------------
A non-text attachment was scrubbed...
Name: f3.patch
Type: text/x-patch
Size: 4526 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20130930/de84b1d9/attachment.bin>