Fix declarations and types conversions to build with -Werror

--- ./encode.c

+++ ./encode.c

@@ -15,7 +15,7 @@

 const char urlencstring[16] = "0123456789abcdef";

-char *urlencode(char *dest, char *source)

+unsigned char *urlencode(unsigned char *dest, unsigned char *source)

 {

 	unsigned char *p, *q;

 	int digit;

@@ -47,7 +47,7 @@ char *urlencode(char *dest, char *source)

  *

  */

-char *urlnencode(char *dest, char *source, size_t length)

+unsigned char *urlnencode(unsigned char *dest, unsigned char *source, size_t length)

 {

 	unsigned char *p, *q;

 	int digit;

--- ./encode.h

+++ ./encode.h

@@ -6,8 +6,8 @@

 #ifndef __LIBSHOUT_ENCODE_H

 #define __LIBSHOUT_ENCODE_H

-char *urlencode(char *dest, char *source);

-char *urlnencode(char *dest, char *source, size_t length);

+unsigned char *urlencode(unsigned char *dest, unsigned char *source);

+unsigned char *urlnencode(unsigned char *dest, unsigned char *source, size_t length);

 #endif  /* __LIBSHOUT_ENCODE_H */

--- ./shout.c

+++ ./shout.c

@@ -19,6 +19,7 @@

 #include "sock.h"

 #include "timing.h"

 #include "mp3.h"

+#include "encode.h"

 /*

  *	INTERNAL PROTOTYPES

@@ -278,10 +279,10 @@ void shout_sleep(shout_conn_t *self)

 	}

 }

-int shout_update_metadata(shout_conn_t *self, char *metadata)

+int shout_update_metadata(shout_conn_t *self, unsigned char *metadata)

 {

 	int s, res;

-	char *metatemp;

+	unsigned char *metatemp;

 	/* sanity check */

 	if ((self->ip == NULL) || (self->password == NULL) ||  (self->port <= 0) || !self->connected) {

@@ -295,7 +296,7 @@ int shout_update_metadata(shout_conn_t *self, char *metadata)

 		return 0;

 	}

-	metatemp = (char *)malloc(strlen(metadata) * 3 + 1);

+	metatemp = (unsigned char *)malloc(strlen((char *)metadata) * 3 + 1);

 	if (metatemp == NULL) {

 		sock_close(s);

 		self->error = SHOUTERR_MALLOC;

--- ./shout.h

+++ ./shout.h

@@ -93,7 +93,7 @@ void shout_sleep(shout_conn_t *self);

 **

 ** the metadata info for the stream.  meta is in block format

 */

-int shout_update_metadata(shout_conn_t *self, char *metadata);

+int shout_update_metadata(shout_conn_t *self, unsigned char *metadata);

 /*

 ** shout_strerror

--- ./sock.c

+++ ./sock.c

@@ -63,10 +63,6 @@

 #include <winsock.h>

 #endif

-#ifndef HAVE_SOCKLEN_T

-#define socklen_t int

-#endif

-

 #ifndef _WIN32

 extern int h_errno, errno;

 #endif

--- ./sock.h

+++ ./sock.h

@@ -34,7 +34,9 @@ typedef int SOCKET;

 #endif

 #define SOCK_BLOCK 0

+#ifndef SOCK_NONBLOCK

 #define SOCK_NONBLOCK 1

+#endif

 /* sock connect macro */

 #define sock_connect(h, p) sock_connect_wto(h, p, 0)