Bug Fix - custom reports

- Fixed bug that applied an empty sequence as a filter, which passed
  no tasks.

src/custom.cpp

@@ -87,11 +87,11 @@ std::string handleCustomReport (const std::string& report)
   // TODO Include filter from custom report.
   context.tdb.load (tasks, context.filter);
   handleRecurrence (tasks);
-  context.tdb.commit ();
   context.tdb.unlock ();
 
   // Filter sequence.
-  context.filter.applySequence (tasks, context.sequence);
+  if (context.sequence.size ())
+    context.filter.applySequence (tasks, context.sequence);
 
   // Initialize colorization for subsequent auto colorization.
   initializeColorRules ();