Fix memory leak with pg_regexec

contrib/tsearch2/ispell/spell.c

@@ -662,8 +662,11 @@ CheckAffix(const char *word, size_t len, AFFIX * Affix, char flagflags, char *ne
 	data = (pg_wchar *) palloc((dat_len + 1) * sizeof(pg_wchar));
 	data_len = pg_mb2wchar_with_len(newword, data, dat_len);
 
-	if (!(err = pg_regexec(&(Affix->reg), data,dat_len,NULL, 1, subs, 0))) 
+	if (!(err = pg_regexec(&(Affix->reg), data,dat_len,NULL, 1, subs, 0))) {
+			pfree(data); 
 			return newword;
+	}
+	pfree(data);
 
 	return NULL;
 }