Rename color output semantic.

Change-Id: Iaa6cf9367f291a4bc3bde899484ca323ff54a0d4
Reviewed-on: https://swiftshader-review.googlesource.com/5381
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
diff --git a/src/Renderer/SetupProcessor.cpp b/src/Renderer/SetupProcessor.cpp
index 1bedf79..08e52c9 100644
--- a/src/Renderer/SetupProcessor.cpp
+++ b/src/Renderer/SetupProcessor.cpp
@@ -173,7 +173,7 @@
 						state.gradient[interpolant][component].flat = point && !sprite;
 						break;
 					case Shader::USAGE_COLOR:
-						state.gradient[interpolant][component].attribute = D0 + index;
+						state.gradient[interpolant][component].attribute = C0 + index;
 						state.gradient[interpolant][component].flat = flatShading;
 						break;
 					default:
@@ -203,7 +203,7 @@
 				{
 					if(context->colorActive(color, component))
 					{
-						state.color[color][component].attribute = D0 + color;
+						state.color[color][component].attribute = C0 + color;
 						state.color[color][component].flat = flatShading;
 					}
 				}