Fix the bug of the first timer being added from idler.

Fix the bug of the first timer being added from idler.

We should start doing unit-test for ecore, accumulating these
problems. Follows the test case:

#include <Ecore.h>
#include <Eina.h>

static int _log_dom;
#define INF(...) EINA_LOG_DOM_INFO(_log_dom, __VA_ARGS__)

static int quiter(void *data)
{
    INF("quit!");
    ecore_main_loop_quit();
    return 1;
}

static int idler(void *data)
{
    INF("idler");
    return 1;
}

static int cb1(void *data)
{
    INF("cb1");
    ecore_timer_add(0.0, quiter, NULL);

    return 0;
}

int main(void)
{
    ecore_init();

    _log_dom = eina_log_domain_register("test", EINA_COLOR_CYAN);

    /*
     * Create a main loop with just idlers, there is a special case
     * for just idlers without timers in ecore.
     *
     * From idler, add a timer that quits the application. It should
     * always quit.
     *
     * If it does not quit, then there is a bug of new timers not
     * being immediately detected and system never exits idle.
     */

    INF("main: begin");
    ecore_idler_add(cb1, NULL);
    ecore_idler_add(idler, NULL);
    ecore_main_loop_begin();
    INF("main: end");
    return 0;
}

git-svn-id: http://svn.enlightenment.org/svn/e/trunk/ecore@46405 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33