core: do not fail if ignorable img.v/ vpick dir is missing

Do not fail if the directory is missing entirely, other than just empty

Follow-up for 00f546e25e
Follow-up for 5e79dd96a8
Follow-up for 622efc544d

src/core/namespace.c

@@ -526,6 +526,8 @@ static int append_extensions(
                               &pick_filter_image_raw,
                               PICK_ARCHITECTURE|PICK_TRIES,
                               &result);
+                if (r == -ENOENT && m->ignore_enoent)
+                        continue;
                 if (r < 0)
                         return r;
                 if (!result.path) {
@@ -594,6 +596,8 @@ static int append_extensions(
                               &pick_filter_image_dir,
                               PICK_ARCHITECTURE|PICK_TRIES,
                               &result);
+                if (r == -ENOENT && ignore_enoent)
+                        continue;
                 if (r < 0)
                         return r;
                 if (!result.path) {