example vcard: fix for building with msvc

Author: Yuguo Zhang

examples/vcard.c

@@ -61,18 +61,10 @@ static void vcard_photo(vcard_t *vc, xmpp_stanza_t *stanza)
     copy = (char *)malloc(strlen(s) + 1);
     assert(copy != NULL);
     copy[0] = '\0';
-#ifdef _WIN32
-    tok = strtok_s(s, "\n\r", &saveptr);
-#else
     tok = strtok_r(s, "\n\r", &saveptr);
-#endif
     while (tok != NULL) {
         strcat(copy, tok);
-#ifdef _WIN32
-        tok = strtok_s(NULL, "\n\r", &saveptr);
-#else
         tok = strtok_r(NULL, "\n\r", &saveptr);
-#endif
     }
 
     xmpp_base64_decode_bin(vc->ctx, copy, strlen(copy), &img, &img_size);