[PATCH] udevd: Avoid implicit memset in match_attr()

[Alan Jenkins <alan-jenkins@tuffmail.co.uk>]

C initializers include an implicit "others => 0" (Ada syntax).
Initializing a char array to "" is equivalent to a memset()
call - which is exactly what it gets compiled to.

Fixing this one callsite reduced memset() _user_ cpu cycles
from 2-4% to 0.05% on the EeePC.

There are other occurences, but the fix isn't that pretty
so I left them alone.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>

diff --git a/udev/udev-rules.c b/udev/udev-rules.c
index 45806c3..ad2b00f 100644
--- a/udev/udev-rules.c
+++ b/udev/udev-rules.c
@@ -1559,10 +1559,11 @@ static int match_attr(struct udev_rules *rules, struct udev_device *dev, struct
 	char attr[UTIL_PATH_SIZE];
 	const char *key_name = &rules->buf[cur->key.attr_off];
 	const char *key_value = &rules->buf[cur->key.value_off];
-	char value[UTIL_NAME_SIZE] = "";
+	char value[UTIL_NAME_SIZE];
 	size_t len;
 
 	util_strlcpy(attr, key_name, sizeof(attr));
+	util_strlcpy(value, "", sizeof(value));
 	util_resolve_subsys_kernel(event->udev, attr, value, sizeof(value), 1);
 	if (value[0] = '\0') {
 		const char *val;