floatclamp(float value, float lower, float upper) {	if (value < lower)		return lower;	if (value > upper)		return upper;	return value;} voidchangealpha(const Arg *arg){	if ((alpha > 0 && arg->f < 0) || (alpha < 1 && arg->f > 0))		alpha += arg->f;	alpha = clamp(alpha, 0.0, 1.0);	xloadcols();	redraw();} #if ALPHA_FOCUS_HIGHLIGHT_PATCHvoidchangealphaunfocused(const Arg *arg){	if ((alphaUnfocused > 0 && arg->f < 0) || (alphaUnfocused < 1 && arg->f > 0))		alphaUnfocused += arg->f;	alphaUnfocused = clamp(alphaUnfocused, 0.0, 1.0);	xloadcols();	redraw();}#endif // ALPHA_FOCUS_HIGHLIGHT_PATCH