Crash on launch

[Aidan Harris]

Traceback (most recent call last):
  File "/usr/share/covergloobus/core/covergloobus.py", line 96, in init
    self.init_ui()
  File "/usr/share/covergloobus/core/covergloobus.py", line 152, in init_ui
    self._window.init()
  File "/usr/share/covergloobus/core/ui.py", line 138, in init
    self.load_xml(path + "/skin.xml")
  File "/usr/share/covergloobus/core/ui.py", line 175, in load_xml
    self.add_text(domitem,type[:-4])
  File "/usr/share/covergloobus/core/ui.py", line 523, in add_text
    text.set_color(self.get_rgba(color))
  File "/usr/share/covergloobus/core/ui.py", line 587, in get_rgba
    int(color[7:9], 16) / 255.0)
ValueError: invalid literal for int() with base 16: ''