remove trailing whitespace

lib/roken/hex.c

@@ -86,7 +86,7 @@ hex_decode(const char *str, void *data, size_t len)
     size_t l;
     unsigned char *p = data;
     size_t i;
-	
+
     l = strlen(str);
 
     /* check for overflow, same as (l+1)/2 but overflow safe */