database: Correctly check return value of dup()

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/database.c b/src/database.c
index a54d72abe0a8b407ee3721e528e154d8eeb51966..0c8608542aaad6e82c4d8602bbeb388ab43225bb 100644 (file)
--- a/src/database.c
+++ b/src/database.c
@@ -403,7 +403,7 @@ static int loc_database_clone_handle(struct loc_database* db, FILE* f) {
 
        // Clone file descriptor
        fd = dup(fd);
-       if (!fd) {
+       if (fd < 0) {
                ERROR(db->ctx, "Could not duplicate file descriptor\n");
                return 1;
        }