[lmi] zOMG std::max({}, something)

[Greg Chicares]

I didn't realize that "{}" acts like a zero of appropriate type here:

 double d = -3.14;
 int i = -17;
-d = std::max(0.0, d);
-i = std::max(0, i);
+d = std::max({}, d);
+i = std::max({}, i);

...and even here:

 std::vector<some_type> v {0,1,2,3,4,5,6,7,8,9,10,11};
-v.assign(12, 0);  // "0", or "0U", "0.0"...as the case may be
+v.assign(12, {}); // a zero of deduced type