lib/hmac.c: Add missing include.

diff --git a/lib/hmac.c b/lib/hmac.c
index ee11d76e04569c45e6c1d3e3adf51c11b26af434..ec247a4f02cf465bef6c9136137ec985076a7507 100644 (file)
--- a/lib/hmac.c
+++ b/lib/hmac.c
@@ -1,5 +1,6 @@
 #include "hmac.h"
 #include <string.h>
+#include <ctype.h>
 
 void hmacsha256_init(hmacsha256 *c, unsigned char *key, int keylen) {
   unsigned char realkey[64], outerkey[64], innerkey[64];