This reverts r63675 based on the discussion in this thread:

 http://mail.python.org/pipermail/python-dev/2008-June/079988.html

Python 2.6 should stick with PyString_* in its codebase.  The PyBytes_* names
in the spirit of 3.0 are available via a #define only.  See the email thread.
diff --git a/RISCOS/Modules/drawfmodule.c b/RISCOS/Modules/drawfmodule.c
index 61aadd3..5f8dc3e 100644
--- a/RISCOS/Modules/drawfmodule.c
+++ b/RISCOS/Modules/drawfmodule.c
@@ -333,7 +333,7 @@
   char *dtable;
   if(!PyArg_ParseTuple(arg,"O!",&PyDict_Type,&d)) return NULL;
   while(PyDict_Next(d,&n,&key,&value))
-  { int m=PyBytes_Size(value);
+  { int m=PyString_Size(value);
     if(m<0||!PyInt_Check(key)) return NULL;
     size+=m+2;
   }
@@ -350,9 +350,9 @@
   memset(dtable,0,size-8);
   n=0;
   while(PyDict_Next(d,&n,&key,&value))
-  { int m=PyBytes_Size(value);
+  { int m=PyString_Size(value);
     *dtable=(char)PyInt_AsLong(key);
-    strcpy(dtable+1,PyBytes_AsString(value));
+    strcpy(dtable+1,PyString_AsString(value));
     dtable+=m+2;
   }
   Py_INCREF(Py_None);return Py_None;
@@ -609,8 +609,8 @@
   if (!strcmp(name, "__members__"))
   { PyObject *list = PyList_New(2);
     if (list)
-    { PyList_SetItem(list, 0, PyBytes_FromString("size"));
-      PyList_SetItem(list, 1, PyBytes_FromString("start"));
+    { PyList_SetItem(list, 0, PyString_FromString("size"));
+      PyList_SetItem(list, 1, PyString_FromString("start"));
       if (PyErr_Occurred()) { Py_DECREF(list);list = NULL;}
     }
     return list;
@@ -659,6 +659,6 @@
 { PyObject *m, *d;
   m = Py_InitModule("drawf", DrawFMethods);
   d = PyModule_GetDict(m);
-  DrawFError=PyBytes_FromString("drawf.error");
+  DrawFError=PyString_FromString("drawf.error");
   PyDict_SetItemString(d,"error",DrawFError);
 }