Update libsrtp to upstream 1.5.0

srtp/crypto/math/datatypes.c

 /*
  * datatypes.c
  *
  * data types for finite fields and functions for input, output, and
  * manipulation
  *
  * David A. McGrew
  * Cisco Systems, Inc.
  */
 /*
@@ skipping 25 matching lines @@
  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
 
+#ifdef HAVE_CONFIG_H
+    #include <config.h>
+#endif
+
 #include "datatypes.h"
 
 int 
 octet_weight[256] = {
   0, 1, 1, 2, 1, 2, 2, 3,
   1, 2, 2, 3, 2, 3, 3, 4,
   1, 2, 2, 3, 2, 3, 3, 4,
   2, 3, 3, 4, 3, 4, 4, 5,
   1, 2, 2, 3, 2, 3, 3, 4,
   2, 3, 3, 4, 3, 4, 4, 5,
@@ skipping 625 matching lines @@
   case '/':
     return 63;
   case '=':
     return 64;
   default:
     break;
  }
  return -1;
 }
 
+#ifdef INCLUDE_DEAD_CODE
 /*
  * base64_string_to_octet_string converts a hexadecimal string
  * of length 2 * len to a raw octet string of length len
  */
 
 int
 base64_string_to_octet_string(char *raw, char *base64, int len) {
   uint8_t x;
   int tmp;
   int base64_len;
 
   base64_len = 0;
   while (base64_len < len) {
     tmp = base64_char_to_sextet(base64[0]);
     if (tmp == -1)
       return base64_len;
     x = (tmp << 6);
     base64_len++;
     tmp = base64_char_to_sextet(base64[1]);
     if (tmp == -1)
       return base64_len;
     x |= (tmp & 0xffff);
     base64_len++;
     *raw++ = x;
     base64 += 2;
   }
   return base64_len;
 }
+#endif