Support sending empty OTP secrets for slot edit (+test)

Signed-off-by: Szczepan Zalega <szczepan@nitrokey.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/misc.cc b/misc.cc
index 7a3c199..3f15520 100644
--- a/misc.cc
+++ b/misc.cc
@@ -13,7 +13,7 @@ std::vector<uint8_t> hex_string_to_byte(const char* hexString){
     const size_t big_string_size = 256; //arbitrary 'big' number
     const size_t s_size = strlen(hexString);
     const size_t d_size = s_size/2;
-    if (s_size%2!=0 || s_size==0 || s_size>big_string_size){
+    if (s_size%2!=0 || s_size>big_string_size){
         throw InvalidHexString(0);
     }
     auto data = std::vector<uint8_t>();