FIX: coverty scan reveals some resourceleaks and overruns, which is supposed to be fixed now.

/armsrc/des.c   overflow 7 instead of 6
/client/cmdlfhitag.c  overflows traclen
/client/util.c   sprint_bin_break  overflows.
/client/cmdhficlass.c   need to free memory after malloc.

ADD:  RotateRight macro in util.h

client/util.h

@@ -17,6 +17,9 @@
 #include <time.h>
 #include "data.h"
 
+#ifndef ROTR
+# define ROTR(x,n) (((uintmax_t)(x) >> (n)) | ((uintmax_t)(x) << ((sizeof(x) * 8) - (n))))
+#endif
 #ifndef MIN
 # define MIN(a, b) (((a) < (b)) ? (a) : (b))
 #endif