2pass stats curruption fix by ("Johannes E. Schindelin" <Johannes dot Schindelin at gmx dot de>)

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10849 b3059339-0415-0410-9bf9-f77b7e298cf2

libmpcodecs/ve_lavc.c

@@ -499,6 +499,7 @@ static int config(struct vf_instance_s* vf,
     	    return 0;
     }
 
+    if(!stats_file) {
     /* lavc internal 2pass bitrate control */
     switch(lavc_param_vpass){
     case 1: 
@@ -529,6 +530,7 @@ static int config(struct vf_instance_s* vf,
 	}        
 	break;
     }
+    }
 
     lavc_venc_context->me_method = ME_ZERO+lavc_param_vme;