nouveau: set MaxDrawBuffers to the same value as MaxColorAttachments

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: mesa-stable@lists.freedesktop.org

src/mesa/drivers/dri/nouveau/nouveau_context.c

@@ -188,7 +188,7 @@ nouveau_context_init(struct gl_context *ctx, gl_api api,
 	ctx->Extensions.EXT_blend_minmax = true;
 	ctx->Extensions.EXT_texture_filter_anisotropic = true;
 	ctx->Extensions.NV_texture_env_combine4 = true;
-	ctx->Const.MaxColorAttachments = 1;
+	ctx->Const.MaxDrawBuffers = ctx->Const.MaxColorAttachments = 1;
 
 	/* This effectively disables 3D textures */
 	ctx->Const.Max3DTextureLevels = 1;