v.parallel: add buffer keyword

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@59529 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.parallel/main.c

@@ -48,6 +48,7 @@ int main(int argc, char *argv[])
     module = G_define_module();
     G_add_keyword(_("vector"));
     G_add_keyword(_("geometry"));
+    G_add_keyword(_("buffer"));
     module->description = _("Creates parallel line to input vector lines.");
 
     in_opt = G_define_standard_option(G_OPT_V_INPUT);