core/mount: fstype may be NULL

src/core/mount.c

@@ -494,7 +494,7 @@ static int mount_add_default_dependencies(Mount *m) {
                 return r;
 
         /* If this is a tmpfs mount then we have to unmount it before we try to deactivate swaps */
-        if (streq(p->fstype, "tmpfs")) {
+        if (streq_ptr(p->fstype, "tmpfs")) {
                 r = unit_add_dependency_by_name(UNIT(m), UNIT_AFTER, SPECIAL_SWAP_TARGET, NULL, true, mask);
                 if (r < 0)
                         return r;