meld: Also catch ValueError, raised by gi.require_version()

Author: kaiw

bin/meld

@@ -193,21 +193,21 @@ def check_requirements():
         from gi.repository import Gtk
         version = (Gtk.get_major_version(), Gtk.get_minor_version())
         assert version >= gtk_requirement
-    except (ImportError, AssertionError) as e:
+    except (ImportError, AssertionError, ValueError) as e:
         missing_reqs("GTK+", gtk_requirement, e)
 
     try:
         from gi.repository import GObject
         assert GObject.glib_version >= glib_requirement
-    except (ImportError, AssertionError) as e:
+    except (ImportError, AssertionError, ValueError) as e:
         missing_reqs("GLib", glib_requirement, e)
 
     try:
         gi.require_version('GtkSource', '3.0')
         from gi.repository import GtkSource
         # TODO: There is no way to get at GtkSourceView's actual version
         assert hasattr(GtkSource, 'SearchSettings')
-    except (ImportError, AssertionError) as e:
+    except (ImportError, AssertionError, ValueError) as e:
         missing_reqs("GtkSourceView", gtksourceview_requirement, e)
 
     try: