Fix error when calling dashboard-previous-section before any section #213
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Place cursor on "Welcome to Emacs!" or just anywhere before the first section, then run `dashboard-previous-section` --- it will error out (at goto-char) complaining that nil is not a number or marker. This is caused by the current version not checking if local variables previous-section-start or current-section-start are non-nil (unlike dashboard-next-section).
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Place the cursor on "Welcome to Emacs!" or just anywhere before the first section, then run
dashboard-previous-section--- it will error out (atgoto-char) complaining that nil is not a number or marker. This is caused by the current version not checking if local variablesprevious-section-startorcurrent-section-startare non-nil (unlikedashboard-next-section).This PR fixes that by making
dashboard-previous-sectionfall back to jumping to the current position (effectively doing nothing) when bothprevious-section-startandnext-section-startare nil.