Properly initialize the MythPlayer::video_aspect field.

The MythPlayer constructor unconditionally initializes video_aspect to
4.0/3.0.  In some configurations, pressing EDIT during the "Please
Wait" screen before the start of playback of a non-4:3 recording, will
bring up the cutlist editor locked into 4:3 mode.  Explicitly
initializing video_aspect earlier fixes this.

mythtv/libs/libmythtv/mythplayer.cpp

@@ -813,6 +813,8 @@ void MythPlayer::SetVideoParams(int width, int height, double fps,
 
     video_dim      = QSize((width + 15) & ~0xf, (height + 15) & ~0xf);
     video_disp_dim = QSize(width, height);
+    if (height)
+        video_aspect = (float)width / height;
 
     if (fps > 0.0f && fps < 121.0f)
     {