[PATCH] Fix for error C3855 when compiling with VC 2008

[Michael Beck]

Hi,
 
VC 2008 seems to get confused by a template forward and friend declaration without type parameter names.
I got an error C3855 in one file when compiling HEAD or 3.3 branch. The following patch fixes that (and removes the forward, which is not
necessary, the friend declaration is enough in that case).

best regards,
 
--
Michael Beck
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