https://sourceforge.net/p/bluefish/tickets/114/
> xml_entity.c:238:11: error: initializing 'gchar *' (aka 'char *')
> with an expression of type 'const gchar *' (aka 'const char *')
> discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
>   238 |                         gchar *nxt = g_utf8_next_char(srcp);
>       |                                ^     ~~~~~~~~~~~~~~~~~~~~~~
--- a/src/xml_entity.c
+++ b/src/xml_entity.c
@@ -235,7 +235,7 @@ gchar *utf82xmlentities(const gchar *inbuf, gboolean iso8859_1, gboolean symbols
 			g_free(entity);
 			srcp = g_utf8_next_char(srcp);
 		} else {
-			gchar *nxt = g_utf8_next_char(srcp);
+			const gchar *nxt = g_utf8_next_char(srcp);
 			outbuf = strncat(outbuf, srcp, (nxt-srcp));
 			srcp = nxt;
 		}