[syslinux:elflink] com32/chain: fix potential problem with 'fs' option

[syslinux-bot for Michal Soltys]

Commit-ID:  69c09a88f6c46ff139cd5c0316d3eeae508e2b5c
Gitweb:     http://www.syslinux.org/commit/69c09a88f6c46ff139cd5c0316d3eeae508e2b5c
Author:     Michal Soltys <soltys at ziu.info>
AuthorDate: Thu, 14 Feb 2013 16:51:47 +0100
Committer:  Michal Soltys <soltys at ziu.info>
CommitDate: Thu, 14 Feb 2013 16:54:09 +0100

com32/chain: fix potential problem with 'fs' option

It's possible, that fs_lba available through syslinux_derivative_info()
could be 0. So match the candidates including disk, instead of only
partitions.

Signed-off-by: Michal Soltys <soltys at ziu.info>

---
 com32/chain/chain.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/com32/chain/chain.c b/com32/chain/chain.c
index d59ab87..ae95d45 100644
--- a/com32/chain/chain.c
+++ b/com32/chain/chain.c
@@ -346,10 +346,10 @@ int find_dp(struct part_iter **_iter)
 
 	/* 'fs' => we should lookup the syslinux partition number and use it */
 	if (!strcmp(opt.drivename, "fs")) {
-	    while (!pi_next(iter)) {
+	    do {
 		if (iter->abs_lba == fs_lba)
 		    break;
-	    }
+	    } while (!pi_next(iter));
 	    /* broken part structure or other problems */
 	    if (iter->status) {
 		error("Can't find myself on the drive I booted from.");