Small fix in import

Author: dimeko

deltascan/cli/cmd.py

@@ -187,6 +187,9 @@ def do_imp(self, v):
         """imp
         Import a file using the current configuration. Ex. imp"""
         # Getting the requested scans from the list of the last scans
+        if v is "":
+            v = None
+
         r = self._app.import_data(v)
         output = CliOutput(r)
         output.display()