Fixes the clang complaint: The right operand of '<' is a garbage value

This might fix #6286.
Signed-off-by: Rafaël Carré <funman@videolan.org>
(cherry picked from commit 8cdc20d360fbefa12671abf8ff30c41384d110c7)
Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>