karme: fix memory leak (trac https://trac.osgeo.org/grass/ticket/273)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@35066 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/db/dbmi_base/column.c

@@ -375,4 +375,7 @@ void db_free_column(dbColumn * column)
 {
     db_free_string(&column->columnName);
     db_free_string(&column->value.s);
+    /* match init? */
+    db_free_string(&column->description);
+    db_free_string(&column->defaultValue.s);
 }