zero dbValue before copying values

    (merge https://trac.osgeo.org/grass/changeset/39510 from relbr64)


git-svn-id: https://svn.osgeo.org/grass/grass/trunk@39512 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/db/dbmi_client/select.c

@@ -203,6 +203,7 @@ int db_select_value(dbDriver * driver, const char *tab, const char *key,
     dbValue *value;
     dbTable *table;
 
+    G_zero(val, sizeof(dbValue));
     sprintf(buf, "SELECT %s FROM %s WHERE %s = %d\n", col, tab, key, id);
     db_init_string(&stmt);
     db_append_string(&stmt, buf);