Planner-list PostgreSQL & Planner

[John Spikowski <support scriptbasic org>]

Got it working.

planner-sql-plugin.c:320: error: format not a string literal and no
format arguments

	dialog = gtk_message_dialog_new (window,
					 GTK_DIALOG_DESTROY_WITH_PARENT,
					 GTK_MESSAGE_ERROR,
					 GTK_BUTTONS_CLOSE,
					 "%s", str);