Fix my botched attempt at supporting function pointers on Sun's compilers.

Also, now only applies the workaround to function pointers, non-function
pointers are treated as before. I might need to apply the special case to
member function pointers as well.


[SVN r39960]

libs/functional

@@ -1 +1 @@
-Subproject commit 4f3f3237dbab31acb53d7adfb35dc6914ed0f9ca
+Subproject commit cd2d453735221a11de51dd31fb164d3bd34bc253