Index: sonar.c
===================================================================
RCS file: /afs/dev.mit.edu/source/repository/third/xscreensaver/hacks/sonar.c,v
retrieving revision 1.1.1.3
diff -u -r1.1.1.3 sonar.c
--- sonar.c	2001/02/26 19:28:26	1.1.1.3
+++ sonar.c	2001/07/01 19:10:51
@@ -1747,7 +1747,10 @@
       char d;
 
       for (next = token;
-           *next != ',' && *next != ' ' && *next != '\t' && *next != '\n';
+           *next && *next != ',' &&
+                    *next != ' ' &&
+                    *next != '\t' &&
+                    *next != '\n';
            next++)
         ;
       *next = 0;