Fix animated logo glitching on some GPUs.

shaders/glsl/LogoAnimated.fp

@@ -83,12 +83,12 @@ void SetupMaterial( inout Material mat )
 	base = blacktoalpha(base);
 	// add alpha of first layer
 	base.a += BilinearSample(Layer1,uv,size,pxsize).a;
-	// clamp
-	base = clamp(base,vec4(0.),vec4(1.));
 	// sixth layer, alpha blend
 	tmp = BilinearSample(Layer6,uv,size,pxsize);
 	tmp2.a = tmp.a+base.a*(1-tmp.a);
 	tmp2.rgb = (tmp.rgb*tmp.a+base.rgb*base.a*(1-tmp.a))/tmp2.a;
+	// clamp
+	tmp2 = clamp(tmp2,vec4(0.),vec4(1.));
 	// ding, logo's done
 	mat.Base = tmp2;
 }