lib: assert(0) still needs a return

assert(0) is not guaranteed to not return since assert() in general can
be optimised out when building without debug / with optimisation.  This
breaks the build in clang, which warns/errors about the missing return.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
(cherry picked from commit f1fc327c7eb00634d2c2b08c2a6f6e44a626ef04)

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/command.c b/lib/command.c
index 37603c46f8..015d97266d 100644
--- a/lib/command.c
+++ b/lib/command.c
@@ -2020,6 +2020,7 @@ cmd_entry_function_desc (const char *src, struct cmd_token *token)
 
       default:
         assert(0);
+        return NULL;
     }
 }