Fixed bug when there is no cd burner installed

HISTORY.md

@@ -1,4 +1,7 @@
 ## History of versions ##
+* version 4.8.9 (2017-07-10)
+  * Fixed bug when there are no CD burner installed
+
 * version 4.8.8 (2017-02-07)
   * Fixed genisoimage bug with some locales
 

setup.py

@@ -72,7 +72,7 @@ except:
 setup(
     name='devedeng',
 
-    version='4.8.8',
+    version='4.8.9',
 
     description='A video DVD creator',
     long_description="A program that allows to create video DVDs",

src/devedeng/interface_manager.py

@@ -453,7 +453,10 @@ class interface_manager(GObject.GObject):
 
         for element in self.interface_comboboxes:
             obj = builder.get_object(element[0])
+            if (len(element[1]) != 0):
                 exec('self.' + element[0] + ' = element[1][obj.get_active()]')
+            else:
+                exec('self.' + element[0] + ' = ""')
 
     def save_ui(self):
         """ Makes a copy of all the UI variables """