* include/functions_gis.php: check in the function "addPath" if the agent
haven't history data. And clean source code.
* operation/agentes/gis_view.php: change to use new tables, and show
messages when the agent haven't data GIS.
* godmode/agentes/agent_conf_gis.php: change the message for agent without
data GIS.
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@2376 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f