Limit `system.{sleep,wait_event}` to timeouts >= 0 (#1666)
Otherwise we might wait forever by mistake.
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@ -386,6 +386,7 @@ static int f_wait_event(lua_State *L) {
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int nargs = lua_gettop(L);
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if (nargs >= 1) {
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double n = luaL_checknumber(L, 1);
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if (n < 0) n = 0;
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lua_pushboolean(L, SDL_WaitEventTimeout(NULL, n * 1000));
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} else {
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lua_pushboolean(L, SDL_WaitEvent(NULL));
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@ -861,6 +862,7 @@ static int f_get_time(lua_State *L) {
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static int f_sleep(lua_State *L) {
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double n = luaL_checknumber(L, 1);
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if (n < 0) n = 0;
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SDL_Delay(n * 1000);
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return 0;
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}
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