Constant evaluation ignore cast-to-bool

[fuhsnn]

#include <stdio.h>
int main(void) {
    printf("%d\n", ({ char a[ (_Bool)2 ]; sizeof(a); })); // expect 1, got 2
    printf("%d\n", ({ char a[ (_Bool)0.1f ]; sizeof(a); })); // expect 1, got 0
}