Fix #11649 Hang in setTokenValue() on huge array

[chrchr-github]

Scanning EGM9615.h now takes less than 1 min.
This might affect code like

int f() {
	const int a[1] = {};
	//const int i[] = { 0, (3, 4), 0 }; // no warning at all
	const int i[3] = { 0, (3, 4), 0 };
	return a[i[1]];
}

but we already show an incorrect warning

bar.cpp:4:10: error: Array 'a[1]' accessed at index 3, which is out of bounds. [arrayIndexOutOfBounds]
 return a[i[1]];
         ^

There's also a FN constStatement.
GCC and clang detect both:
https://godbolt.org/z/Pxann8T4s