Don't report cyclic dependency when there not a single to form a graph.

Reviewer: Marcelo Lira <marcelo.lira@openbossa.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/abstractmetabuilder.cpp b/abstractmetabuilder.cpp
index 9d55c49d3..288afda35 100644
--- a/abstractmetabuilder.cpp
+++ b/abstractmetabuilder.cpp
@@ -2897,7 +2897,7 @@ AbstractMetaClassList AbstractMetaBuilder::classesTopologicalSorted(const Abstra
 
     AbstractMetaClassList result;
     unmappedResult = graph.topologicalSort();
-    if (unmappedResult.isEmpty()) {
+    if (unmappedResult.isEmpty() && graph.nodeCount()) {
         QTemporaryFile tempFile;
         tempFile.setAutoRemove(false);
         tempFile.open();