Blender/Python API

Send the full python stack trace to the reporting api,
added BPY_exception_buffer which temporarily overrides sys.stdout and sys.stderr to get the output (uses the io module in py3 StringIO in py2 to avoid writing into a real file), pity the Py/C api has no function to do this.

fix for crash when showing menu's that have no items.

source/blender/python/intern/bpy_util.h

@@ -47,6 +47,8 @@ void PyObSpit(char *name, PyObject *var);
 void PyLineSpit(void);
 void BPY_getFileAndNum(char **filename, int *lineno);
 
+PyObject *BPY_exception_buffer(void);
+
 /* own python like utility function */
 PyObject *PyObject_GetAttrStringArgs(PyObject *o, Py_ssize_t n, ...);
 
@@ -73,6 +75,7 @@ char *BPy_enum_as_string(struct EnumPropertyItem *item);
 
 /* error reporting */
 int BPy_reports_to_error(struct ReportList *reports);
+int BPy_errors_to_report(struct ReportList *reports);
 
 /* TODO - find a better solution! */
 struct bContext *BPy_GetContext(void);