sideband.c: make send_sideband() return void

The send_sideband() function uses write_or_die() for writing data which
immediately terminates the process on errors. If no such error occurred,
send_sideband() always returned the value that was passed as fourth
parameter prior to this commit. This value is already known to the
caller in any case, so let's turn send_sideband() into a void function
instead.

Signed-off-by: Lukas Fleischer <lfleischer@lfos.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

sideband.c

@@ -124,9 +124,8 @@ int recv_sideband(const char *me, int in_stream, int out)
  * fd is connected to the remote side; send the sideband data
  * over multiplexed packet stream.
  */
-ssize_t send_sideband(int fd, int band, const char *data, ssize_t sz, int packet_max)
+void send_sideband(int fd, int band, const char *data, ssize_t sz, int packet_max)
 {
-	ssize_t ssz = sz;
 	const char *p = data;
 
 	while (sz) {
@@ -148,5 +147,4 @@ ssize_t send_sideband(int fd, int band, const char *data, ssize_t sz, int packet
 		p += n;
 		sz -= n;
 	}
-	return ssz;
 }

sideband.h

@@ -5,6 +5,6 @@
 #define SIDEBAND_REMOTE_ERROR -1
 
 int recv_sideband(const char *me, int in_stream, int out);
-ssize_t send_sideband(int fd, int band, const char *data, ssize_t sz, int packet_max);
+void send_sideband(int fd, int band, const char *data, ssize_t sz, int packet_max);
 
 #endif

upload-pack.c

@@ -60,8 +60,10 @@ static void reset_timeout(void)
 
 static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
 {
-	if (use_sideband)
-		return send_sideband(1, fd, data, sz, use_sideband);
+	if (use_sideband) {
+		send_sideband(1, fd, data, sz, use_sideband);
+		return sz;
+	}
 	if (fd == 3)
 		/* emergency quit */
 		fd = 2;