Tweak scaling and VCA limits

src/Blinds.cpp

@@ -48,7 +48,7 @@ Blinds::Blinds() {
 }
 
 static float getChannelOutput(const float *in, float gain, const float *cv, float mod, float *light) {
-	gain += mod * getf(cv) / 5.0;
+	gain += mod * fmaxf(getf(cv) / 5.0, 0.0);
 	*light = gain * 5.0;
 	return gain * getf(in, 5.0);
 }

src/Veils.cpp

@@ -56,7 +56,7 @@ static float getChannelOutput(float *in, float gain, float *cv, float response)
 		if (linear == 0.0)
 			return 0.0;
 		const float ex = 200.0;
-		float exponential = (powf(ex, linear) - 1.0) / (ex - 1.0);
+		float exponential = rescalef(powf(ex, linear), 1.0, ex, 0.0, 1.0);
 		out *= crossf(exponential, linear, response);
 	}
 	return out;