libcrypto: Add missing includes for modes.h

This defines block128_f.

Fixes T133.

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit 65bc24d8a4)

src/libcrypto.c

@@ -43,6 +43,7 @@
 #include <openssl/hmac.h>
 #include <openssl/opensslv.h>
 #include <openssl/rand.h>
+
 #include "libcrypto-compat.h"
 
 #ifdef HAVE_OPENSSL_AES_H
@@ -54,6 +55,10 @@
 #include <openssl/des.h>
 #endif
 
+#ifdef HAVE_OPENSSL_CRYPTO_CTR128_ENCRYPT
+#include <openssl/modes.h>
+#endif
+
 #if (OPENSSL_VERSION_NUMBER<0x00907000L)
 #define OLD_CRYPTO
 #endif