small bug in libedit might cause abnormal program termination

[elad]

    libedit covers several vi and emacs functions and stores
    descriptions about them in a structure called el_func_help
    which will be generated automatically. This structure is
    terminated by { NULL, 0, NULL } as customary to have an
    exit condition for use with loops. The problem is that
    the map_init function in lib/libedit/map.c do not respect
    this null-termination. It allocates memory for only N
    functions, but N+1 is necessary to include the termination.
    You'll get a segmentation fault in certain cases.

[elad]

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