[syslinux:elflink] ldlinux: Use '\0' instead of NULL when dealing with characters

[syslinux-bot for Matt Fleming]

Commit-ID:  dfcc2037c8c5222df0552c07492a35a65fe5af09
Gitweb:     http://www.syslinux.org/commit/dfcc2037c8c5222df0552c07492a35a65fe5af09
Author:     Matt Fleming <matt.fleming at intel.com>
AuthorDate: Mon, 2 Apr 2012 14:44:46 +0100
Committer:  Matt Fleming <matt.fleming at intel.com>
CommitDate: Tue, 17 Apr 2012 10:58:34 +0100

ldlinux: Use '\0' instead of NULL when dealing with characters

We should be using '\0', not NULL when signalling 'end of string'.
Using NULL results in the following warning,

readconfig.c: In function ‘parse_one_config’:
readconfig.c:1355:17: warning: assignment makes integer from pointer without a cast

Signed-off-by: Matt Fleming <matt.fleming at intel.com>

---
 com32/elflink/ldlinux/readconfig.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/com32/elflink/ldlinux/readconfig.c b/com32/elflink/ldlinux/readconfig.c
index 61f9552..d310662 100644
--- a/com32/elflink/ldlinux/readconfig.c
+++ b/com32/elflink/ldlinux/readconfig.c
@@ -1352,7 +1352,7 @@ static int parse_one_config(const char *filename)
 
 	if (config_cwd[0]) {
 		chdir(config_cwd);
-		config_cwd[0] = NULL;
+		config_cwd[0] = '\0';
 	}
 
 	return 0;