[gnome-builder] python-gi: ensure GIRepository directory exists before iterating

[Christian Hergert <chergert src gnome org>]

commit e6e58c48902a23512e5c079572762acbc932b8b7
Author: Christian Hergert <chergert redhat com>
Date:   Wed Oct 7 17:21:55 2015 -0400

    python-gi: ensure GIRepository directory exists before iterating

 .../python_gi_imports_completion.py                |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/plugins/python-gi-imports-completion/python_gi_imports_completion.py 
b/plugins/python-gi-imports-completion/python_gi_imports_completion.py
index 03e916a..e5210a0 100644
--- a/plugins/python-gi-imports-completion/python_gi_imports_completion.py
+++ b/plugins/python-gi-imports-completion/python_gi_imports_completion.py
@@ -109,10 +109,11 @@ class CompletionProvider(Ide.Object,
         self._libraries_expire_at = now + CACHE_EXPIRE_USEC
 
         for directory in GIRepository.Repository.get_search_path():
-            for filename in os.listdir(directory):
-                name = filename.split('-')[0]
-                if name not in self._libraries:
-                    self._libraries.append(name)
+            if os.path.exists(directory):
+                for filename in os.listdir(directory):
+                    name = filename.split('-')[0]
+                    if name not in self._libraries:
+                        self._libraries.append(name)
 
         self._libraries.sort()