Wireshark: free GPtrArrays (#143)

The Wireshark functions `proto_all_finfos()` and `proto_find_finfo()`
return `GPtrArray` pointers which must be freed when no longer in use.
(This is poorly documented in Wireshark but that will be addressed.)
Free the results of these function calls to prevent memory leaks.

wireshark/source/packet-ja4.c

@@ -707,10 +707,13 @@ static void init_ja4_data(packet_info *pinfo, ja4_info_t *ja4_data) {
 
 static void set_ja4_extensions(proto_tree *tree, ja4_info_t *data) {
 	guint value;
-	GPtrArray *items = proto_find_finfo(tree, proto_registrar_get_id_byname("tls.handshake.extension.type"));
+	GPtrArray *items;
 	if (data->proto == 'd') {
 		items = proto_find_finfo(tree, proto_registrar_get_id_byname("dtls.handshake.extension.type"));
 	}
+	else {
+		items = proto_find_finfo(tree, proto_registrar_get_id_byname("tls.handshake.extension.type"));
+	}
         if (items) {
                 guint i;
                 for (i=0; i< items->len; i++) {
@@ -728,6 +731,7 @@ static void set_ja4_extensions(proto_tree *tree, ja4_info_t *data) {
 				data->ext_len ++;
 			}
 		}
+		g_ptr_array_free(items,TRUE);
 	}
 	if (wmem_strbuf_get_len(data->extensions) > 3) {
 		wmem_strbuf_truncate(data->extensions, wmem_strbuf_get_len(data->extensions)-1);
@@ -736,10 +740,13 @@ static void set_ja4_extensions(proto_tree *tree, ja4_info_t *data) {
 
 static void set_ja4_ciphers(proto_tree *tree, ja4_info_t *data) {
 	guint value;
-	GPtrArray *items = proto_find_finfo(tree, proto_registrar_get_id_byname("tls.handshake.ciphersuite"));
+	GPtrArray *items;
 	if (data->proto == 'd') {
 		items = proto_find_finfo(tree, proto_registrar_get_id_byname("dtls.handshake.ciphersuite"));
 	}
+	else {
+		items = proto_find_finfo(tree, proto_registrar_get_id_byname("tls.handshake.ciphersuite"));
+	}
 
 	if (items) {
                 guint i;
@@ -752,6 +759,7 @@ static void set_ja4_ciphers(proto_tree *tree, ja4_info_t *data) {
 				data->cipher_len ++;
 			}
 		}
+		g_ptr_array_free(items,TRUE);
 	}
 	if (wmem_strbuf_get_len(data->ciphers) > 3) {
 		wmem_strbuf_truncate(data->ciphers, wmem_strbuf_get_len(data->ciphers)-1);
@@ -1225,7 +1233,7 @@ dissect_ja4(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void *dummy
 			}
 
             	}
-            	//g_ptr_array_free(items,TRUE);
+		g_ptr_array_free(items,TRUE);
         }
 
 	if (syn == 1) {