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trfn: space may be mapped to nbspace (0xa0)

Reported by Dirk-Wilhelm Peters <peters@schwertfisch.de>.

--- a/trfn.c

+++ b/trfn.c

@@ -273,12 +273,11 @@

 		if (!strchr(psname, '.'))

 			sprintf(pos, "%d", uc[0]);

 	typ = trfn_type(!strchr(psname, '.') ? uc : "", lly, ury);

+	if (!trfn_swid && (!strcmp(" ", uc) || !strcmp(" ", uc)))

+		trfn_swid = WX(wid);

 	/* printing troff charset */

-	if (strchr(uc, ' ')) {	/* space not allowed in char names */

-		if (!trfn_swid && !strcmp(" ", uc))

-			trfn_swid = WX(wid);

+	if (strchr(uc, ' '))	/* space not allowed in char names */

 		return;

-	}

 	if (strcmp("---", uc))

 		trfn_lig(uc);

 	sbuf_printf(&sbuf_char, "char %s\t%d", uc, WX(wid));