Fix level end screen

This was using screens[1] which I had deallocated when fixing the status
bar (I incorrectly assumed it was used only for that).

While the CGDOOM technique to share screens[1] to avoid allocating the
320x20 buffer for the status bar makes clear sense with that new
information, I think I'll keep this 6.4 kB buffer there and rather
search for ways to use more memory zones.

README

@@ -7,7 +7,6 @@ Credit goes to:
 * Lephenixnoir for the final fixes and fx-CG 50 version.
 
 TODO:
--> Fix level recap texture
 -> Fix screen not cleared when changing resolution, add larger resolutions
 -> Try and support more WADs
 -> Reenable LTO if possible

cgdoom/v_video.c

@@ -354,7 +354,13 @@ void V_Init (void)
   /*int  i;
   for (i=0 ; i< SCREEN_COUNT; i++)
   screens[i] = CGDMalloc(SCREENWIDTH*SCREENHEIGHT);*/
+
+  /* screens[0] is the main screen */
   screens[0] = SaveVRAMBuffer;
+  /* screens[1] is used for the level end sequence (intermission) */
+  screens[1] = SaveVRAMBuffer + SCREENWIDTH*SCREENHEIGHT;
+  /* screens[2] and screens[3] are used for wipe effects (disabled here) */
+  /* screens[4] is used for the status bar (allocated by st_stuff.c) */
 
   //Blank the screen, to indicate on real hardware that SOMETHING is going on
   //Done since loading on real hardware takes so damn long