Assert that another xasprintf call returns non-NULL

As with commit a22f140354c80a7c5c52c4a413f1c929e105a24c, `gcc
-fanalyzer` notices that `xasprintf` can return NULL in some situations.
I believe those situations would all amount to programming errors here,
so add an assert.

* src/mandb.c (main): Assert that `xasprintf` returns non-NULL.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/mandb.c b/src/mandb.c
index 1817153b..751f942e 100644
--- a/src/mandb.c
+++ b/src/mandb.c
@@ -965,6 +965,7 @@ int main (int argc, char *argv[])
 
 			subdirpath = xasprintf ("%s/%s", mp,
 						subdirent->d_name);
+			assert (subdirpath);
 			ret = process_manpath (subdirpath, global_manpath,
 					       tried_catdirs);
 			if (ret < 0)