Curly braces

Minor edit: more portable syntax for aggregate initialization. Omitting curly braces prevents compiling on (some/many?) Mac OSX systems with standard xcode tools and recommended prerequisites. 'error: cannot omit braces around initialization of subobject when using direct list-initialization'. I believe omitting the braces is possible (not mandatory) in C++14 but not possible in standard C++11 or earlier.
Merge pull request #491 from rbeverly/patch-1

Curly braces