patch from Honza Horak using Coverity's static analysis tool.

lib/paranoia/paranoia.c

@@ -1357,14 +1357,14 @@ i_stage2_each(root_block *root, v_fragment_t *v,
 	      void(*callback)(long int, paranoia_cb_mode_t))
 {
 
+  /* If this fragment has already been merged & freed, abort. */
+  if (!v || !v->one) return(0);
+
   cdrom_paranoia_t *p=v->p;
 
   /* ??? Why do we round down to an even dynoverlap? */
   long dynoverlap=p->dynoverlap/2*2;
   
-  /* If this fragment has already been merged & freed, abort. */
-  if (!v || !v->one) return(0);
-
   /* If there's no verified root yet, abort. */
   if (!rv(root)){
     return(0);