Backport VLM seek command modifications and compilation warning fixes. Thanks to Igor Helman in the forums who provided this backport patch :)

mozilla: looks like firefox does not dipose of script objects cleanly, which is causing it to reuse them after the plugin has been destroyed 

Detect CD-R and DVD-R mediums

  Patch by Diego Petteno

* backport [17802] VLC now requires libmatroska 0.7.7 because from then the libs are pic enabled. 
    (no longer use libmatroska_pic ebml_pic) 
    Patch by Diego Petteno, +additions by me. 

activex: fixed type library crash (this would cause most programming language to crash), IE does not use type library and was immune to this problem

  - use ToLocale open for the .bin vcdimage file (not 100% fixed, but better then before and i don't feel like backporting utf8_open)
  - Try .bin when opening a .cue, instead of trying the filename in the .cue (it's usually wrong). 
    When the .bin filename fails, then look into the .cue file for a possible alternate name. 
  - Don't crash on non-existing cuefile's

* Update the NEWS

* backport [17752]: allow empty subtitles. These are used to wipe ephemer substitles of the screen. Used by Timed Text