Prevents the following senseless warnings:
In mc/first-fake-cursor-after:
mc-cycle-cursors.el:76:70:Warning: function `remove-if' from cl package called
at runtime
mc-cycle-cursors.el:78:64:Warning: function `sort*' from cl package called at
runtime
In mc/last-fake-cursor-before:
mc-cycle-cursors.el:85:71:Warning: function `remove-if' from cl package called
at runtime
mc-cycle-cursors.el:87:65:Warning: function `sort*' from cl package called at
runtime
Instead of erroring if there is no next (respectively previous) cursor
mc/cycle-forward (respectively mc/cycle-backward) will just loop back
to the first (respectively last) cursor.
