MT#55283 fix compilation error for pcre2 >= 10.43

The pcre2 API was changed from

	pcre2_substring_list_free(PCRE2_SPTR *)

to

	pcre2_substring_list_free(PCRE2_UCHAR **)

in 10.43. The difference is a `const` qualifier. Work around this.

Closes #1869

Change-Id: Ib3dd3003352f6c3155bb47d69ecb7a1b02f4647a

daemon/control_tcp.c

@@ -102,7 +102,7 @@ static int control_stream_parse(struct streambuf_stream *s, char *line) {
 		free(output);
 	}
 
-	pcre2_substring_list_free((PCRE2_SPTR *) out);
+	pcre2_substring_list_free((SUBSTRING_FREE_ARG) out);
 	pcre2_match_data_free(md);
 	log_info_pop();
 	return 1;

daemon/control_udp.c

@@ -62,7 +62,7 @@ static void control_udp_incoming(struct obj *obj, struct udp_buffer *udp_buf) {
 
 		socket_sendiov(udp_buf->listener, iov, iovlen, &udp_buf->sin, &udp_buf->local_addr);
 
-		pcre2_substring_list_free((PCRE2_SPTR *) out);
+		pcre2_substring_list_free((SUBSTRING_FREE_ARG) out);
 		pcre2_match_data_free(md);
 
 		return;
@@ -135,7 +135,7 @@ static void control_udp_incoming(struct obj *obj, struct udp_buffer *udp_buf) {
 		cookie_cache_remove(&u->cookie_cache, &cookie);
 
 out:
-	pcre2_substring_list_free((PCRE2_SPTR *) out);
+	pcre2_substring_list_free((SUBSTRING_FREE_ARG) out);
 	pcre2_match_data_free(md);
 	log_info_pop();
 }

include/helpers.h

@@ -30,6 +30,12 @@ typedef bool (*parse_func)(char **, void **, void *);
 
 int pcre2_multi_match(pcre2_code *, const char *, unsigned int, parse_func, void *, GQueue *);
 
+#if PCRE2_MAJOR > 10 || (PCRE2_MAJOR == 10 && PCRE2_MINOR >= 43)
+#define SUBSTRING_FREE_ARG PCRE2_UCHAR **
+#else
+#define SUBSTRING_FREE_ARG PCRE2_SPTR *
+#endif
+
 
 
 /*** GLIB HELPERS ***/