check for NULL before closing batchfp

this silences a warning from clang-scan 19.

diff --git a/bin/dig/dig.c b/bin/dig/dig.c
index d4867cc28278459f75bf52ac1a008cb3d9efa0b9..3e59f7f21aa2a11ba9b817e6a6dc153dc354a6c9 100644 (file)
--- a/bin/dig/dig.c
+++ b/bin/dig/dig.c
@@ -3079,7 +3079,7 @@ void
 dig_shutdown(void) {
        destroy_lookup(default_lookup);
        if (atomic_load(&batchname) != 0) {
-               if (batchfp != stdin) {
+               if (batchfp != NULL && batchfp != stdin) {
                        fclose(batchfp);
                }
                atomic_store(&batchname, 0);