# HG changeset patch
# User jbe
# Date 1428110526 -7200
# Node ID 8090fe97518ad9702ad98298244df803a2d9047c
# Parent  5df424e743835542568c58dc06a20cfcab374cd5
Second table to io.poll(...) is optional

diff -r 5df424e74383 -r 8090fe97518a moonbridge.c
--- a/moonbridge.c	Sat Apr 04 01:38:25 2015 +0200
+++ b/moonbridge.c	Sat Apr 04 03:22:06 2015 +0200
@@ -2295,23 +2295,25 @@
   } else {
     idx_tbl = 2;
   }
-  luaL_checktype(L, idx_tbl, LUA_TTABLE);
-  for (i=1; ; i++) {
+  if (!lua_isnoneornil(L, idx_tbl)) {
+    luaL_checktype(L, idx_tbl, LUA_TTABLE);
+    for (i=1; ; i++) {
 #if LUA_VERSION_NUM >= 503
-    if (lua_geti(L, idx_tbl, i) == LUA_TNIL) break;
+      if (lua_geti(L, idx_tbl, i) == LUA_TNIL) break;
 #else
-    lua_pushinteger(L, i);
-    lua_gettable(L, idx_tbl);
-    if (lua_isnil(L, -1)) break;
+      lua_pushinteger(L, i);
+      lua_gettable(L, idx_tbl);
+      if (lua_isnil(L, -1)) break;
 #endif
-    fd = lua_tointegerx(L, -1, &isnum);
-    if (!isnum) luaL_error(L, "File descriptor is not an integer");
-    FD_SET(fd, &writefds);
-    if (fd+1 > nfds) nfds = fd+1;
-    lua_pop(L, 1);
+      fd = lua_tointegerx(L, -1, &isnum);
+      if (!isnum) luaL_error(L, "File descriptor is not an integer");
+      FD_SET(fd, &writefds);
+      if (fd+1 > nfds) nfds = fd+1;
+      lua_pop(L, 1);
+    }
+    lua_pop(L, 2);
+    if (!idx_timeout && !lua_isnoneornil(L, 3)) idx_timeout = 3;
   }
-  lua_pop(L, 2);
-  if (!idx_timeout && !lua_isnoneornil(L, 3)) idx_timeout = 3;
   if (idx_timeout) {
     luaL_argcheck(
       L,