Fix memleak

Untested
Closes #2306

(cherry picked from commit 88a9bbf3)

modules/codec/quicktime.c

@@ -669,11 +669,11 @@ static aout_buffer_t *DecodeAudio( decoder_t *p_dec, block_t **pp_block )
  *****************************************************************************/
 static int OpenVideo( decoder_t *p_dec )
 {
+#ifndef WIN32
     decoder_sys_t *p_sys = malloc( sizeof( decoder_sys_t ) );
     if( !p_sys )
         return VLC_ENOMEM;
 
-#ifndef WIN32
     vlc_mutex_t                        *lock;
     long                                i_result;
     ComponentDescription                desc;