problem with boost::relaxed_heap::log2 under cygwin

[nobody]

Dears, 

on some cygwin systems the private function 
boost::relaxed_heap::log2 does not allow correct 
compilation. This is due to the #define log2 present 
on some system headers files that introduce some 
dirty code into the relaxed heap preprocess file. The 
solution is quite simple: change the name into 
something of different of log2.

Best Regards,

Fabrizio Ferrandi

[Douglas Gregor]

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user_id=249098

The name of log2 has been changed in Boost CVS and the fix will be present 
in Boost 1.34.