[RP] Bug in editor.c?

[alex]

hi all,

i think i found a bug in editor.c.

I got random segfaults on my boxes, patch is self explanatory.

greets
        -alex
        
===================================================================
RCS file: /sources/ratpoison/ratpoison/src/editor.c,v
retrieving revision 1.13
diff -u -r1.13 editor.c
--- src/editor.c        13 Jun 2005 21:38:14 -0000      1.13
+++ src/editor.c        4 Feb 2006 18:41:59 -0000
@@ -454,7 +454,7 @@
       line->buffer = xrealloc (line->buffer, line->size);
     }
 
-  for (i = line->length + nbytes; i > line->position; i--)
+  for (i = line->length + nbytes; i > line->position && i >= nbytes; i--)
     line->buffer[i] = line->buffer[i - nbytes];
 
   strncpy (&line->buffer[line->position], keysym_buf, nbytes);