[layers] working swap between main/spare, and loading files in command-line. Start of work on variable layers number and layer sharing.

git-svn-id: svn://pulkomandy.tk/GrafX2/branches/layers@1044 416bcca6-2ee7-4201-b75f-2eb2f807beb1

operatio.c

@@ -4026,7 +4026,7 @@ void Scroll_0_5(void)
     
     
     // Do the actual scroll operation on all layers.
-    for (i=0; i<NB_LAYERS; i++)
+    for (i=0; i<Main_backups->Pages->Nb_layers; i++)
       Scroll_picture(Main_backups->Pages->Next->Image[i], Main_backups->Pages->Image[i], x_offset, y_offset);
   }  
   else