Is there a way to see if .init has been set by the user?

[simendsjo]

I want to know if a variable has changed .init, but I don't know 
if it's possible if the .init value is the same. Does anyone have 
a solution for this?

     int a;
     int b = 0;
     pragma(msg, a.init); // 0
     pragma(msg, b.init); // 0
     // how can I see that b has "= 0"?