stop response skip loop at nul in commandtops

diff --git a/filter/commandtops.c b/filter/commandtops.c
index c0c38945d03a8599e60ee6c1afc2bec995d5dfc0..c19b16d89463f9b8024d84834716e3085ec932cc 100644 (file)
--- a/filter/commandtops.c
+++ b/filter/commandtops.c
@@ -318,7 +318,7 @@ auto_configure(ppd_file_t *ppd,             /* I - PPD file */
        else
          break;
 
-      for (bufptr = buffer; isspace(*bufptr & 255) || iscntrl(*bufptr & 255);
+      for (bufptr = buffer; *bufptr && (isspace(*bufptr & 255) || iscntrl(*bufptr & 255));
           bufptr ++);
 
       if (bufptr > buffer)