[haskeline] #113: Use CAString FFI functions instead of CString ones

[haskeline]

#113: Use CAString FFI functions instead of CString ones
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Reporter:  batterseapower  |        Owner:     
    Type:  enhancement     |       Status:  new
Priority:  minor           |    Milestone:     
 Version:                  |   Resolution:     
Keywords:                  |  
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Comment(by batterseapower):

 Yes, I'm working on doing it :-). I've been checking GHC and its boot
 libraries for suspicious use of the *CString functions hence this patch.

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Ticket URL: <http://trac.haskell.org/haskeline/ticket/113#comment:2>
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