dtc: fix some more -Wshadow warnings

Building on a RHEL6 system produced the following -Wshadow warnings in
fstree.c, util.c and checks.c:

cc1: warnings being treated as errors
checks.c: In function 'parse_checks_option':
checks.c:709: error: declaration of 'optarg' shadows a global
declaration
/usr/include/getopt.h:59: error: shadowed declaration is here
make[1]: *** [checks.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: *** Waiting for unfinished jobs....
cc1: warnings being treated as errors
fstree.c: In function 'read_fstree':
fstree.c:40: error: declaration of 'tmpnam' shadows a global
declaration
/usr/include/stdio.h:208: error: shadowed declaration is here
make[1]: *** [fstree.o] Error 1
cc1: warnings being treated as errors
util.c: In function 'xstrdup':
util.c:42: error: declaration of 'dup' shadows a global declaration
/usr/include/unistd.h:528: error: shadowed declaration is here

Fix all of these -Wshadow warnings by using slightly different variable
names which won't collide with anything else.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/checks.c b/checks.c
index 11a4086..47eda65 100644
--- a/checks.c
+++ b/checks.c
@@ -706,15 +706,15 @@ static void disable_warning_error(struct check *c, bool warn, bool error)
 	c->error = c->error && !error;
 }
 
-void parse_checks_option(bool warn, bool error, const char *optarg)
+void parse_checks_option(bool warn, bool error, const char *arg)
 {
 	int i;
-	const char *name = optarg;
+	const char *name = arg;
 	bool enable = true;
 
-	if ((strncmp(optarg, "no-", 3) == 0)
-	    || (strncmp(optarg, "no_", 3) == 0)) {
-		name = optarg + 3;
+	if ((strncmp(arg, "no-", 3) == 0)
+	    || (strncmp(arg, "no_", 3) == 0)) {
+		name = arg + 3;
 		enable = false;
 	}