homework: silence gcc warning

gcc was warning that found_fs_uuid was used unitialized. The issue stemmed from
the call to open(), where gcc seemingly didn't know that errno must be negative.
When that is set, we can drop some unnecessary initializations without warnings.

diff --git a/src/home/homework-luks.c b/src/home/homework-luks.c
index 100b0e16501d60c22c3ca3d64ba3c79032d34bd0..0ab8e207cd0d12c7e2f84bf884285bc05386244a 100644 (file)
--- a/src/home/homework-luks.c
+++ b/src/home/homework-luks.c
@@ -179,7 +179,7 @@ static int probe_file_system_by_path(const char *path, char **ret_fstype, sd_id1
 
         fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
         if (fd < 0)
-                return -errno;
+                return negative_errno();
 
         return probe_file_system_by_fd(fd, ret_fstype, ret_uuid);
 }
@@ -1229,7 +1229,7 @@ int home_setup_luks(
                 PasswordCache *cache,
                 UserRecord **ret_luks_home) {
 
-        sd_id128_t found_partition_uuid = SD_ID128_NULL, found_luks_uuid = SD_ID128_NULL, found_fs_uuid = SD_ID128_NULL;
+        sd_id128_t found_partition_uuid, found_fs_uuid, found_luks_uuid = SD_ID128_NULL;
         _cleanup_(user_record_unrefp) UserRecord *luks_home = NULL;
         _cleanup_(erase_and_freep) void *volume_key = NULL;
         size_t volume_key_size = 0;