libsubid: Fix code style issues

tests/libsubid/04_nss/libsubid_zzz.c

@@ -139,6 +139,7 @@ enum subid_status shadow_subid_list_owner_ranges(const char *owner, enum subid_t
 	return SUBID_STATUS_SUCCESS;
 }
 
-void shadow_subid_free(void *ptr) {
+void shadow_subid_free(void *ptr)
+{
 	free(ptr);
 }