detail ('1' -> '1u' in unsigned operation)

ltable.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.c,v 2.117 2015/11/19 19:16:22 roberto Exp roberto $
+** $Id: ltable.c,v 2.118 2016/11/07 12:38:35 roberto Exp roberto $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -496,7 +496,7 @@ TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
 */
 const TValue *luaH_getint (Table *t, lua_Integer key) {
   /* (1 <= key && key <= t->sizearray) */
-  if (l_castS2U(key) - 1 < t->sizearray)
+  if (l_castS2U(key) - 1u < t->sizearray)
     return &t->array[key - 1];
   else {
     Node *n = hashint(t, key);