Fix caching of unsuccessful initialization of parser or configuration.

Per report from Listmail <lists@peufeu.com>

contrib/tsearch2/ts_cfg.c

@@ -224,8 +224,8 @@ findcfg(Oid id)
 		CList.reallen = reallen;
 		CList.list = tmp;
 	}
+	init_cfg(id, &(CList.list[CList.len]) );
 	CList.last_cfg = &(CList.list[CList.len]);
-	init_cfg(id, CList.last_cfg);
 	CList.len++;
 	qsort(CList.list, CList.len, sizeof(TSCfgInfo), comparecfg);
 	return findcfg(id); /* qsort changed order!! */ ;

contrib/tsearch2/wparser.c

@@ -127,8 +127,8 @@ findprs(Oid id)
 		PList.reallen = reallen;
 		PList.list = tmp;
 	}
+	init_prs(id, &(PList.list[PList.len]) );
 	PList.last_prs = &(PList.list[PList.len]);
-	init_prs(id, PList.last_prs);
 	PList.len++;
 	qsort(PList.list, PList.len, sizeof(WParserInfo), compareprs);
 	return findprs(id); /* qsort changed order!! */ ;