Allow init/deinit in filters to be optional.

diff --git a/gpsbabel/main.c b/gpsbabel/main.c
index 477e2368a57267df93fa0c5a6c24810b572b884f..a9fb1dc352039984ae276a31c4c449c0a8e2c26a 100644 (file)
--- a/gpsbabel/main.c
+++ b/gpsbabel/main.c
@@ -192,9 +192,9 @@ main(int argc, char *argv[])
                                fvecs = find_filter_vec(optarg, &fvec_opts);
 
                                if (fvecs) {
-                                       fvecs->f_init(fvec_opts);
+                                       if (fvecs->f_init) fvecs->f_init(fvec_opts);
                                        fvecs->f_process();
-                                       fvecs->f_deinit();
+                                       if (fvecs->f_deinit) fvecs->f_deinit();
                                        free_filter_vec(fvecs);
                                }  else {
                                        fatal("Unknown filter '%s'\n",optarg);