Fix warnings:
cfg-common.h:349: warning: redundant redeclaration of 'vd_use_slices'
libmpcodecs/vd.h:19: warning: previous declaration of 'vd_use_slices' was here
cfg-common.h:350: warning: redundant redeclaration of 'divx_quality'
libmpcodecs/dec_video.h:23: warning: previous declaration of 'divx_quality' was here

Index: mplayer/cfg-common.h
===================================================================
--- mplayer/cfg-common.h	(revision 24384)
+++ mplayer/cfg-common.h	(working copy)
@@ -346,8 +346,6 @@
 extern float movie_aspect;
 extern int softzoom;
 extern int flip;
-extern int vd_use_slices;
-extern int divx_quality;
 
 /* defined in codec-cfg.c */
 extern char * codecs_file;