threads: Make sure vlc_assert_locked() doesn't result in an unused parameter warning.

diff --git a/include/vlc_threads.h b/include/vlc_threads.h
index c84512b977f24478bca05eb986a824d99c62b03d..5cee5bf05ddb07813b1256c848fda1b2cb745095 100644 (file)
--- a/include/vlc_threads.h
+++ b/include/vlc_threads.h
@@ -209,7 +209,7 @@ static inline void __vlc_mutex_lock( const char * psz_file, int i_line,
 }
 
 #ifndef vlc_assert_locked
-# define vlc_assert_locked( m ) (void)0
+# define vlc_assert_locked( m ) (void)m
 #endif
 
 /*****************************************************************************