Song importer repeatVerse function crashes on no verse order

[Phill]

Song importer repeatVerse function crashes on no verse order.
This is because it assumes that the verse order list is has an Item and selects the last item. Where there is no verse order, this causes an index error.

This bug was reported with the "Songs of Fellowship" importer, but in theory could affect all importers. http://support.openlp.org/issues/1631

Seen on both Ubuntu 12.04, and confirmed on Windows 7

[Phill (phill-ridout)]

--- Exception Traceback ---
Traceback (most recent call last):
   File "/usr/lib/pymodules/python2.7/openlp/core/ui/wizard.py", line
187, in onCurrentIdChanged
     self.performWizard()
   File
"/usr/lib/pymodules/python2.7/openlp/plugins/songs/forms/songimportform.py",
line 390, in performWizard
     importer.doImport()
   File
"/usr/lib/pymodules/python2.7/openlp/plugins/songs/lib/oooimport.py",
line 85, in doImport
     self.processOooDocument()
   File
"/usr/lib/pymodules/python2.7/openlp/plugins/songs/lib/sofimport.py",
line 91, in processOooDocument
     self.processSofFile()
   File
"/usr/lib/pymodules/python2.7/openlp/plugins/songs/lib/sofimport.py",
line 106, in processSofFile
     self.processParagraph(paragraph)
   File
"/usr/lib/pymodules/python2.7/openlp/plugins/songs/lib/sofimport.py",
line 136, in processParagraph
     self.processParagraphText(text)
   File
"/usr/lib/pymodules/python2.7/openlp/plugins/songs/lib/sofimport.py",
line 143, in processParagraphText
     self.processParagraphLine(line)
   File
"/usr/lib/pymodules/python2.7/openlp/plugins/songs/lib/sofimport.py",
line 180, in processParagraphLine
     self.repeatVerse()
   File
"/usr/lib/pymodules/python2.7/openlp/plugins/songs/lib/songimport.py",
line 277, in repeatVerse
     self.verseOrderListGenerated[-1])
IndexError: list index out of range