Fix syntax bug.

pym/cl_fill_install.py

@@ -864,12 +864,12 @@ class fillVars(object, glob_attr):
     def get_os_install_x11_video_drv(self):
         """Video driver used by xorg"""
         if self.Get('os_install_root_type') == 'usb-hdd':
-            avialable_drivers = getAvailableX11Drivers()
+            available_drivers = getAvailableX11Drivers()
             videoVal = self.getValueFromCmdLine("calculate","video")
             videoVal = {'i915':'intel'}.get(videoVal,videoVal)
-            if videoVal in list_avialable_drivers:
+            if videoVal in available_drivers:
                 return videoVal
-            return self.getVideoByDefault(list_avialable_drivers)
+            return self.getVideoByDefault(available_drivers)
         else:
             return self.Get('os_x11_video_drv')