use the OpenSSL AES implementation if it's available (unless configured not to)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@66071 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/aescrypt.c

@@ -42,13 +42,15 @@
  * \author Dr Brian Gladman <brg@gladman.me.uk>
  */
 
-#include "aesopt.h"
-
 #if defined(__cplusplus)
 extern "C"
 {
 #endif
 
+#ifndef HAVE_CRYPTO
+
+#include "aesopt.h"
+
 #define si(y,x,k,c) (s(y,c) = word_in(x, c) ^ (k)[c])
 #define so(y,x,c)   word_out(y, c, s(x,c))
 
@@ -312,6 +314,8 @@ aes_rval aes_decrypt(const void *in_blk, void *out_blk, const aes_decrypt_ctx cx
 
 #endif
 
+#endif /* !HAVE_CRYPTO */
+
 #if defined(__cplusplus)
 }
 #endif