analyze: fix seg-fault with no cl-argument

We need to check if argv[1] is set before compare

src/analyze/analyze.c

@@ -1349,7 +1349,7 @@ int main(int argc, char *argv[]) {
         if (r <= 0)
                 goto finish;
 
-        if (streq(argv[optind], "verify"))
+        if (streq_ptr(argv[optind], "verify"))
                 r = verify_units(argv+optind+1,
                                  arg_user ? SYSTEMD_USER : SYSTEMD_SYSTEM,
                                  arg_man);