WriteCM:

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   Write a matrix for use in a C or C++ program.

   Since version 1.
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   Form:
   WriteCM( fID, matName, m, x, nD, nT, nPR )
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   Inputs
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   fID                      File id
   matName                  Name of matrix for comment in C code
   m                        Name of matrix for C code
   x                        The matrix
   nD                       Number of decimal places
   nT                       Number of characters total
   nPR                      Number per row (default is 3 for
                            matrices and 1 for vectors);

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   Outputs
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   none

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