Fix "variable not used" warnings when USE_WIDE_UPPER_LOWER is not

defined.

src/backend/tsearch/ts_locale.c

@@ -243,7 +243,9 @@ char *
 lowerstr_with_len(const char *str, int len)
 {
 	char	   *out;
+#ifdef USE_WIDE_UPPER_LOWER
 	Oid			collation = DEFAULT_COLLATION_OID; /*TODO*/
+#endif
 
 	if (len == 0)
 		return pstrdup("");

src/backend/tsearch/wparser_def.c

@@ -287,7 +287,6 @@ static TParser *
 TParserInit(char *str, int len)
 {
 	TParser    *prs = (TParser *) palloc0(sizeof(TParser));
-	Oid			collation = DEFAULT_COLLATION_OID; /*TODO*/
 
 	prs->charmaxlen = pg_database_encoding_max_length();
 	prs->str = str;
@@ -300,6 +299,8 @@ TParserInit(char *str, int len)
 	 */
 	if (prs->charmaxlen > 1)
 	{
+		Oid			collation = DEFAULT_COLLATION_OID; /*TODO*/
+		
 		prs->usewide = true;
 		if ( lc_ctype_is_c(collation) )
 		{