v.import: catch exception when unable to open datasource

          (merge https://trac.osgeo.org/grass/changeset/66965 from trunk)


git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@66966 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/v.import/v.import.py

@@ -106,7 +106,10 @@ def main():
 
     # list layers and exit
     if flags['l']:
-        grass.run_command('v.in.ogr', flags='l', input=options['input'])
+        try:
+            grass.run_command('v.in.ogr', flags='l', input=options['input'])
+        except CalledModuleError:
+            return 1
         return 0
 
     OGRdatasource = options['input']