NORSPEC-156 move gamma correction to vert shader

indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl

@@ -42,7 +42,7 @@ void main()
 {
 	float shadow = 1.0;
 
-	vec4 color = diffuseLookup(vary_texcoord0.xy)*pow(vertex_color.rgb,vec3(2.2f,2.2f,2.2f));
+	vec4 color = diffuseLookup(vary_texcoord0.xy)* vertex_color;
 	color.rgb = fullbrightAtmosTransport(color.rgb);
 	color.rgb = fullbrightScaleSoftClip(color.rgb);
 	frag_color = color;

indra/newview/app_settings/shaders/class1/deferred/fullbrightV.glsl

@@ -58,7 +58,7 @@ void main()
 	
 	calcAtmospherics(pos.xyz);
 	
-	vertex_color = diffuse_color;
-
+	vertex_color.rgb = pow(diffuse_color, vec3(2.2f,2.2f,2.2f));
+	vertex_color.a   = diffuse_color.a;
 	
 }