lmdb: catch non-LMDB negative errors before strerror

That should hopefully shut coverity up

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 40728e716bf3ed77371bf1933ef2d349b61ccee1..3b4652ec6467384650de5b7887c70aa738b2ade6 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -1752,6 +1752,8 @@ mdb_strerror(int err)
                NULL, err, 0, ptr, MSGSIZE, (va_list *)buf+MSGSIZE);
        return ptr;
 #else
+       if (err < 0)
+               return "Invalid error code";
        return strerror(err);
 #endif
 }