Fixed a crash introduced in r3497, triggered when using control-left
or right arrows in the editor to move a sequence location.


git-svn-id: svn://svn.code.sf.net/p/staden/code/staden/trunk@3726 ba6f2710-ca9f-427c-89d3-5bf716dbc8e1
Fixed the STR finder to not step forward by 'extra' bytes as an
optimisation.  It was causing overlapping repeats to sometimes be
missed by 1 bp. Eg:

$ ./a.out CTAAATAAATAAAC
 2 .. 12 AAATAAATAAA

(Should be 1 .. 12)



git-svn-id: svn://svn.code.sf.net/p/staden/code/staden/trunk@3727 ba6f2710-ca9f-427c-89d3-5bf716dbc8e1