Remove a stray semicolon. Fix a type conversion that has become invalid in C++11. Update the XML parser test to cope with the new detail/utf8_codecvt layout. See bugs 6808 and 6785 for the first two issues.

svn path=/trunk/boost/property_tree/; revision=78550
Don't use an uninitialized variable if trying to read a numeric char from a property and the value is out of bounds for the target type. See bug 4391. This is the only place where the warning that some compilers give makes sense; if it still occurs after this change, it's just broken.

svn path=/trunk/boost/property_tree/; revision=81507