[PATCH] e820: fix clip_to_limit()

[Xiao Guangrong <ericxiao.gr@gmail.com>]

In clip_to_limit(), after memmove(&e820.map[i], &e820.map[i+1], ...), the original
e820.map[i+1] become current e820.map[i] but the next loop count is i+1, so the original
e820.map[i+1] will be skipped

Actually, e820 is sorted form low to high by sanitize_e820_map(), so we can simply break
the loop if we meet the item which overrun "limit"

Signed-off-by: Xiao Guangrong <ericxiao.gr@gmail.com>

diff -r 93bc06dd1161 -r 5e06f2790d93 xen/arch/x86/e820.c
--- a/xen/arch/x86/e820.c	Tue Nov 10 02:41:59 2009 +0800
+++ b/xen/arch/x86/e820.c	Tue Nov 10 03:51:08 2009 +0800
@@ -389,6 +389,7 @@
                      (e820.nr_map - i - 1) * sizeof(struct e820entry));
              e820.nr_map--;
          }
+	break;
      }

      if ( old_limit )