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 3847ec62ba6721d4d5747cf53b1133288946d10d..527a47b8f15a1e82dd55380f5b38024faa31ce9a 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -1517,6 +1517,8 @@ 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
 }