Fix bare except clauses in ptyprocess.py: use except Exception

[koteshyelamati]

Fix 2 bare except: clauses in ptyprocess/ptyprocess.py that catch BaseException, replacing them with except Exception:.

Line 339 (in _make_pty_ioctl / exec error parsing):
except: → except Exception: — wraps error data parsing from a subprocess pipe; any parsing failure re-raises a generic Exception, so catching BaseException is unnecessary.

Line 391 (in __init__ / setwinsize cleanup):
except: pass → except Exception: pass — comment already notes uncertainty about which exception to catch; using Exception is the correct conservative fix that still allows KeyboardInterrupt and SystemExit to propagate.

Bare except: clauses are bad practice (PEP 8 / flake8 E722) because they silently swallow KeyboardInterrupt and SystemExit.