Introduce realloc_or_free() to src/*, and add assert() to mark unhandled ENOMEM error conditions. Allocation shrinking or otherwise handled allocations don't need realloc_or_free.

This follows the historical LibVLC semantic (and new --rate one), so
bigger is faster. In the process, simplify a few code paths, especially
those in LibVLC, but make many other code paths more complicated due to
integer<->float conversion. Most of those paths could probably be
simplified.

 * Fix RC "fastforward" command behaviour (it was slowing down instead)
 * Fix str_format_mera 'R' format string with negative rates and
   rates such that (rate % 1000 < 100).

Brought to you by M2X. Needless to mention that this is complete 100%
crap. Depending cases, it's not either ignoring errors (and e.g. leaking
memory which is very stupid in OOM situations), or worse, introducing
bugs in places where realloc() was used correctly.

And exactly one day after I WARNED EXPLICITLY AGAINST DOING THIS.

This reverts commit ec5d8611.

Trimmed and
Signed-off-by: Rémi Denis-Courmont <rdenis@simphalempin.com>

setup test output #standard{mux=ts,access=udp,dst=239.255.100.42,sap,name="Pouet Pouet"}
That's maybe not the best way to do this.
Fix #2346

Fix a segfault which orrured when you set a schedule date with only a time like in : 'new test schedule date 18:00:00'
In fact, this was not supported and the test condition was wrong.

Also tell the user when the VLM couln't set a schedule property.
Signed-off-by: Rémi Duraffort <ivoire@videolan.org>

(we don't want sample scripts to break in certain countries)

vlm: Fix a warning about a non initialized pointer use, and fix a potential free() of a random pointer.

Now we can remove the VLM object type.

In the function ExecuteCommand, p_message is given in argument to ExecuteHelp
and is then modified locally in ExecuteHelp:
  p_message = vlm_MessageNew( "help", vlm_NULL );
whereas it is used further in function ExecuteCommand.
This patch fixes this problem by passing the pointer address in argument to
ExecuteHelp instead of the pointer itself.
Signed-off-by: Pierre d'Herbemont <pdherbemont@videolan.org>

This improves readability a lot and prevent us from reinventing the wheel.

vlm: Only use gc enabled input item. (input_ItemClean and input_ItemInit shouldn't be used directly).

vlm: Don't automatically detach in vlm_Delete if not needed, this will be done at destroy time if needed (This should fix some rare bug).