INT 31H 0d01H: Free Shared Memory

                                                    Compatibility: DPMI 1.0+ 
 Expects: AX    0d01H
          SI:DI handle of shared memory block as obtained via INT 31H 0d00H
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 Returns: CF    NC (clear) if successful; else AX = DPMI Error Code
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    Info: This frees an a named block of memory that was allocated via
          INT 31H 0d00H.

          It actually decrements the per-VM use-count and the global
          use-count.  The allocated memory is freed only when the global
          use-count has been decremented to 0.

See Also: DPMI API
          INT 2fH: Multiplex Interrupt
          DOS Functions
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