Update sepia.glsl

Data/Sys/Shaders/sepia.glsl

@@ -6,9 +6,11 @@ in vec2 uv0;
 void main()
 {
 	vec4 c0 = texture(samp9, uv0);
+
 	// Same coefficients as grayscale2 at this point
 	float avg = (0.222 * c0.r) + (0.707 * c0.g) + (0.071 * c0.b);
 	float red=avg;
+
 	// Not sure about these coefficients, they just seem to produce the proper yellow
 	float green=avg*.75;
 	float blue=avg*.5;