Proposed tweak for `slime-lisp-options'

Hi, `slime-lisp-options' in slime.el uses `split-string' to parse the contents of `inferior-lisp-program' This fails if the lisp program is in a path with spaces in it (such as executables in Windows). Quoting does not help. One could instead use split-string-and-unquote: (split-string-and-unquote "\"c:/Program Files (x86)/clisp-2.49/clisp.exe\" -E iso-8859-1") ("c:/Program Files (x86)/clisp-2.49/clisp.exe" "-E" "iso-8859-1") Mirko