fixes bug introduced in commit #7d90f569

hinted by gcc:

libzfs_import.c: In function ‘fix_paths’:
libzfs_import.c:602:28: warning: self-comparison always evaluates to true [-Wtautological-compare]
    if (best->ne_num_labels == best->ne_num_labels &&
                                ^~

lib/libzfs/libzfs_import.c

@@ -599,7 +599,7 @@ fix_paths(nvlist_t *nv, name_entry_t *names)
 			}
 
 			/* Prefer paths earlier in the search order. */
-			if (best->ne_num_labels == best->ne_num_labels &&
+			if (ne->ne_num_labels == best->ne_num_labels &&
 			    ne->ne_order < best->ne_order) {
 				best = ne;
 				continue;