[Matrix-SIG] Previous solution dumps core due to typo and long-standing bug.

[Travis Oliphant]

The previous solution I just posted dumped core when used on arrays
with rank > 0 (I had just tried it with rank-0 arrays).  

The mistake is that copy should be copy=copy in the call to self.__class__
in _arrayret.

The reason it dumps core is due to a long-standing bug that has still not
been fixed the solution to which was posted by Charles Waldman May 26.

The C-code uses the typecode argument as a string without first making
sure it is a string:  

The following (indicated with +) needs to be added to both array_array in
multiarraymodule.c and now array_init in arraymodule.c:

        if (tpo == Py_None) {
                type = PyArray_NOTYPE;
        } else {
+               if (!PyString_Check(tpo)){
+                       PyErr_SetString(PyExc_TypeError, 
+                                       "typecode must be a character");
+                       return NULL;
+               }
                tp = PyString_AsString(tpo);
                if (tp[0] == 0) type = PyArray_NOTYPE;
                else type = tp[0];


Travis