Fix data align problem while build on ARMv7

--- libteredo/md5.c

+++ libteredo/md5.c

@@ -176,14 +176,9 @@ md5_process(md5_state_t *pms, const md5_byte_t *data /*[64]*/)

 	     * On little-endian machines, we can process properly aligned

 	     * data without copying it.

 	     */

-	    if (!((data - (const md5_byte_t *)0) & 3)) {

-		/* data are properly aligned */

-		X = (const md5_word_t *)data;

-	    } else {

 		/* not aligned */

 		memcpy(xbuf, data, 64);

 		X = xbuf;

-	    }

 	}

 #endif

 #if BYTE_ORDER == 0

--- libteredo/packets.c

+++ libteredo/packets.c

@@ -204,7 +204,7 @@ teredo_parse_ra (const teredo_packet *restrict packet,

 		 case ND_OPT_PREFIX_INFORMATION:

 		 {

 			const struct nd_opt_prefix_info *pi = 

-				(const struct nd_opt_prefix_info *)hdr;

+				(const struct nd_opt_prefix_info *)(void const *)hdr;

 			if ((optlen < sizeof (*pi)) /* option too short */

 			 || (pi->nd_opt_pi_prefix_len != 64) /* unsupp. prefix size */)

@@ -224,7 +224,7 @@ teredo_parse_ra (const teredo_packet *restrict packet,

 		/* MTU option */

 		 case ND_OPT_MTU:

 		 {

-			const struct nd_opt_mtu *mo = (const struct nd_opt_mtu *)hdr;

+			const struct nd_opt_mtu *mo = (const struct nd_opt_mtu *)(void const *)hdr;

 			/*if (optlen < sizeof (*mo)) -- not possible (optlen >= 8)

 				return -1;*/

--- libteredo/maintain.c

+++ libteredo/maintain.c

@@ -97,13 +97,12 @@ static int getipv4byname (const char *restrict name, uint32_t *restrict ipv4)

 	if (val)

 		return val;

-	*ipv4 = ((const struct sockaddr_in *)(res->ai_addr))->sin_addr.s_addr;

+	*ipv4 = ((const struct sockaddr_in *)(void const *)(res->ai_addr))->sin_addr.s_addr;

 	freeaddrinfo (res);

 	return 0;

 }

-

 /**

  * Checks and parses a received Router Advertisement.

  *

--- libteredo/teredo.c

+++ libteredo/teredo.c

@@ -226,7 +226,7 @@ static int teredo_recv_inner (int fd, struct teredo_packet *p, int flags)

 		 && (cmsg->cmsg_type == IP_PKTINFO))

 		{

 			const struct in_pktinfo *nfo =

-				(struct in_pktinfo *)CMSG_DATA (cmsg);

+				(struct in_pktinfo *)(void *)CMSG_DATA (cmsg);

 			p->dest_ipv4 = nfo->ipi_addr.s_addr;

 		}

 # elif defined(IP_RECVDSTADDR)

@@ -305,7 +305,7 @@ static int teredo_recv_inner (int fd, struct teredo_packet *p, int flags)

 	}

 	p->ip6_len = length;

-	p->ip6 = (struct ip6_hdr *)ptr;

+	p->ip6 = (struct ip6_hdr *)(void *)ptr;

 	return 0;

 }

--- src/conf.c

+++ src/conf.c

@@ -402,7 +402,7 @@ int GetIPv4ByName (const char *hostname, uint32_t *ipv4)

 	if (check)

 		return check;

-	*ipv4 = ((const struct sockaddr_in *)res->ai_addr)->sin_addr.s_addr;

+	*ipv4 = ((const struct sockaddr_in *)(const void *)res->ai_addr)->sin_addr.s_addr;

 	freeaddrinfo (res);

 	return 0;

 }