当使用glib的g_regex_split_simple时，检查捕获组是否实际捕获了任何内容的最佳方法是什么？

#include <glib.h>
#include <stdio.h>

int main() {    
        char *teststring = "<initiator>{address == 10.20.30.40, port == 5060, transport == UDP}</initiator>";

        char **addressMatches = g_regex_split_simple("address\\s*=*\\s*(\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3})", teststring, 0, 0);

        // What is the proper way to test here that there was a match found?
        // This sort of works sometimes, but can result in segfault on some platforms if a match is not found
        if (addressMatches[2]) {
                printf("IP: %s\n", addressMatches[1]);
        }
}