Bug in PolynomialInflate?

[lamont-granquist]

template <int N, typename ftype> inline void PolynomialInflate( ftype infPoly[N+2], ftype const coef[N+1], ftype root )
{
	infPoly[N+1] = coef[N];
	for ( int i=N-1; i>=0; --i ) infPoly[i+1] = coef[i] - root*infPoly[i+1];
	infPoly[0] = -root*coef[0];
}

Should that be infPoly[i+1] = coef[i] - root * coef[i+1]?

Completely possible that I can't math or computer before caffeine this morning, but my C# version of that code isn't passing tests I wrote without that change and the fix makes sense in my head since it combines the lines before and after it, and the middle coefficients in the results are what I'm seeing being buggy.

[cemyuksel]

Nice catch! Yes, that is a bug, and, yes, your fix appears to be correct.