sprintf: hex_string(): fix comment

hex_string() had a typo in a comment.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index e149c64..7d84676 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -670,7 +670,7 @@
 char *hex_string(char *buf, char *end, u8 *addr, struct printf_spec spec,
 		 const char *fmt)
 {
-	int i, len = 1;		/* if we pass '%ph[CDN]', field witdh remains
+	int i, len = 1;		/* if we pass '%ph[CDN]', field width remains
 				   negative value, fallback to the default */
 	char separator;