Fix for "NoneType object has no attribute group" error

[Bobidobi]

Tested on latest miniconda with Python 3.10.16

Unsloth throws error:
AttributeError: 'NoneType' object has no attribute 'group'
Which links to

unsloth-zoo/unsloth_zoo/patching_utils.py

Line 334 in 1101ee0

n = len(re.search(r"\n([ ]{1,})return compiled_fn", source).group(1))

I suggest adding safecheck as described in pyrhon docs

match = re.search(r"\n([ ]{1,})return compiled_fn", source)
if match:
    n = len(match.group(1))
else:
    n = 0

That code fixed it for me
P.S. Sorry, i'm not pushing commit, because i'm not a good programmer, maybe there is a more elegant solution to that error