[boost] [smart_ptr] Patch submitted for #1113

All, I submitted a patch for ticket #1113 [1] which allows statements like the following: boost::shared_array<int> pNonConst; boost::shared_array<const int> pConst = pNonConst; while preventing treating arrays polymophically. It has been tested on windows with VC8, VC10, g++3.X and g++4.X. Additionally it has been tested on solaris with g++3.4. I didn't modify the tests, but running them seems to produce the correct output. I'd appreciate it if someone could take a look at it, perhaps applying it if it looks good. Thanks, Nate [1] <https://svn.boost.org/trac/boost/ticket/1113>