X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=hacks%2Fglx%2Fsonar.c;h=66d8b833ff8f006070a7086102cc0a52ce3965fb;hp=cdafdef5d0f4dd349047fcf7fae5a79c1993d257;hb=50be9bb40dc60130c99ffa568e6677779904ff70;hpb=5f1f12f2a37da634000f96d18d59cc73a8814ef7

diff --git a/hacks/glx/sonar.c b/hacks/glx/sonar.c
index cdafdef5..66d8b833 100644
--- a/hacks/glx/sonar.c
+++ b/hacks/glx/sonar.c
@@ -559,9 +559,11 @@ static void
 copy_and_insert_bogie (sonar_sensor_data *ssd, sonar_bogie *b,
                        sonar_bogie **to_list)
 {
-  sonar_bogie *ob, *prev;
+  sonar_bogie *ob, *next;
   if (!b) abort();
-  for (prev = 0, ob = *to_list; ob; prev = ob, ob = ob->next)
+  for (ob = *to_list, next = ob ? ob->next : 0; 
+       ob; 
+       ob = next, next = ob ? ob->next : 0)
     {
       if (ob == b) abort();   /* this will end badly */
       if (!strcmp (ob->name, b->name))  /* match! */