ui-diff.c: create a control panel for diff options

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

cmd.c

@@ -56,7 +56,7 @@ static void commit_fn(struct cgit_context *ctx)
 
 static void diff_fn(struct cgit_context *ctx)
 {
-	cgit_print_diff(ctx->qry.sha1, ctx->qry.sha2, ctx->qry.path);
+	cgit_print_diff(ctx->qry.sha1, ctx->qry.sha2, ctx->qry.path, 1);
 }
 
 static void info_fn(struct cgit_context *ctx)