Staging: speakup: &&/|| confusion in silent_store()

Fix test: the branch is always taken.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/speakup/kobjects.c

@@ -332,7 +332,7 @@ static ssize_t silent_store(struct kobject *kobj, struct kobj_attribute *attr,
 	unsigned long flags;
 
 	len = strlen(buf);
-	if (len > 0 || len < 3) {
+	if (len > 0 && len < 3) {
 		ch = buf[0];
 		if (ch == '\n')
 			ch = '0';