Black screen for one player in two player mode in Mario kart 64

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Describe your system:
- Operating System (be specific):
   Raspian wheezy (retropie)
 - Machine type (32-bit or 64-bit):64bit (raspberry pi 2)
 - Mupen64Plus version:ricrpi branch
 - Plugins used:rice

For visual artifacts, give:
- game name and CRC/MD5 hash (printed on console)
- description of the artifact (missing polygons, flashing, wrong colors,
etc)

Describe the problem:

In 2 player mode in Mario kart 64, one screen is always black. On first race, 
bottom screen is always black. If player 2 happens to win with aid of player 
one's screen, player one's screen will be black on next race, and player two's 
screen will then be functional.

Please provide any additional information below.

Original issue reported on code.google.com by clone...@gmail.com on 15 Feb 2015 at 11:47