Fix gcc -pedantic error:extra extra ';'

Merged revisions 53203 via svnmerge from 
https://svn.boost.org/svn/boost/trunk


[SVN r53467]

libs/functional

@@ -1 +1 @@
-Subproject commit 1c701a70bb7e2513fb31d00fd80c920721a30c5f
+Subproject commit 594caeb0afe02531accc66f5fa106f23c9a7d7c3