Don't check syslog value if we don't have syslog.h

src/libvlc.c

@@ -780,11 +780,13 @@ int VLC_Init( int i_object, int i_argc, char *ppsz_argv[] )
     {
         VLC_AddIntf( 0, "logger", VLC_FALSE, VLC_FALSE );
     }
+#ifdef HAVE_SYSLOG_H
     if( config_GetInt( p_vlc, "syslog" ) == 1 )
     {
         char *psz_logmode = "logmode=syslog";
         AddIntfInternal( 0, "logger", VLC_FALSE, VLC_FALSE, 1, &psz_logmode );
     }
+#endif
 
     if( config_GetInt( p_vlc, "show-intf" ) == 1 )
     {