Update libsrtp to upstream 1.5.0

srtp/crypto/math/gf2_8.c

 /*
  * gf2_8.c
  *
  * GF(256) finite field implementation, with the representation used
  * in the AES cipher.
  * 
  * David A. McGrew
  * Cisco Systems, Inc.
  */
 
@@ skipping 27 matching lines @@
  * (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"
 #include "gf2_8.h"
 
 /* gf2_8_shift() moved to gf2_8.h as an inline function */
 
 gf2_8
 gf2_8_multiply(gf2_8 x, gf2_8 y) {
   gf2_8 z = 0;
 
   if (y &   1) z ^= x; x = gf2_8_shift(x);
@@ skipping 16 matching lines @@
   unsigned int i;
 
   if (x == 0) return 0;    /* zero is a special case */
   for (i=0; i < 256; i++)
     if (gf2_8_multiply((gf2_8) i, x) == 1)
       return (gf2_8) i;
 
     return 0;
 }