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Fix for rescue mode crashes

From: Timothy Baldwin
Subject: Fix for rescue mode crashes
Date: Sat, 22 May 2004 13:44:47 +0100
User-agent: KMail/1.6.2

Rescue mode crashes when a null string is entered (only sometimes on bochs). 
Here is a patch to fix it:

Index: kern/rescue.c
RCS file: /cvsroot/grub/grub2/kern/rescue.c,v
retrieving revision 1.8
diff -u -r1.8 rescue.c
--- kern/rescue.c       4 Apr 2004 13:46:02 -0000       1.8
+++ kern/rescue.c       21 May 2004 09:28:32 -0000
@@ -676,12 +676,12 @@
       /* Get a command line.  */
       grub_rescue_get_command_line ("grub rescue> ");

-      if (grub_split_cmdline (line, getline, &n, &args))
+      if (grub_split_cmdline (line, getline, &n, &args) || n < 0)

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