avcodec/libxvid: set lumi_aq for lumimasking

Simplifies check and should fix lumi+vari warning
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/libxvid.c

@@ -531,14 +531,17 @@ static av_cold int xvid_encode_init(AVCodecContext *avctx)  {
         xvid_enc_create.num_plugins++;
     }
 
+    if ( avctx->lumi_masking != 0.0)
+        x->lumi_aq = 1;
+
     /* Luminance Masking */
-    if( avctx->lumi_masking != 0.0 || x->lumi_aq ) {
+    if( x->lumi_aq ) {
         masking_l.method = 0;
         plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
 
         /* The old behavior is that when avctx->lumi_masking is specified,
          * plugins[...].param = NULL. Trying to keep the old behavior here. */
-        plugins[xvid_enc_create.num_plugins].param = x->lumi_aq ? &masking_l : NULL ;
+        plugins[xvid_enc_create.num_plugins].param = avctx->lumi_masking ? NULL : &masking_l ;
         xvid_enc_create.num_plugins++;
     }