PyAPI: PyC_Err_PrintWithFunc utility function

Move function error printing utility into py_capi_utils.

source/blender/python/generic/py_capi_utils.c

@@ -412,6 +412,25 @@ PyObject *PyC_Err_Format_Prefix(PyObject *exception_type_prefix, const char *for
 	return NULL;
 }
 
+/**
+ * Use for Python callbacks run directly from C,
+ * when we can't use normal methods of raising exceptions.
+ */
+void PyC_Err_PrintWithFunc(PyObject *py_func)
+{
+	/* since we return to C code we can't leave the error */
+	PyCodeObject *f_code = (PyCodeObject *)PyFunction_GET_CODE(py_func);
+	PyErr_Print();
+	PyErr_Clear();
+
+	/* use py style error */
+	fprintf(stderr, "File \"%s\", line %d, in %s\n",
+	        _PyUnicode_AsString(f_code->co_filename),
+	        f_code->co_firstlineno,
+	        _PyUnicode_AsString(((PyFunctionObject *)py_func)->func_name)
+	        );
+}
+
 
 /* returns the exception string as a new PyUnicode object, depends on external traceback module */
 #if 0

source/blender/python/generic/py_capi_utils.h

@@ -38,6 +38,8 @@ PyObject *		PyC_ExceptionBuffer_Simple(void);
 PyObject *		PyC_Object_GetAttrStringArgs(PyObject *o, Py_ssize_t n, ...);
 PyObject *		PyC_FrozenSetFromStrings(const char **strings);
 PyObject *		PyC_Err_Format_Prefix(PyObject *exception_type_prefix, const char *format, ...);
+void			PyC_Err_PrintWithFunc(PyObject *py_func);
+
 void			PyC_FileAndNum(const char **filename, int *lineno);
 void			PyC_FileAndNum_Safe(const char **filename, int *lineno); /* checks python is running */
 int             PyC_AsArray_FAST(