Message 111413 - Python tracker

Patch based on Python 2 source code, but raises a MemoryError (instead of an OSError) on memory allocation failure.

With my patch, bigpath.py ends with "cwd: 1028 ...aab/aaaaab" with Python Python 3.2. Same result with Python 2.6. 1028 is bigger than 1026 (previous hardcoded max length in bytes including nul byte).