remote-curl.c: fix rpc_out()

Remove the extraneous semicolon (';') at the end of the if statement
that allowed the code in its block to execute regardless of the
condition.

This fixes pushing to a smart http backend with chunked encoding.

Signed-off-by: Tay Ray Chuan <rctay89@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

remote-curl.c

@@ -307,7 +307,7 @@ static size_t rpc_out(void *ptr, size_t eltsize,
 		rpc->len = avail;
 	}
 
-	if (max < avail);
+	if (max < avail)
 		avail = max;
 	memcpy(ptr, rpc->buf + rpc->pos, avail);
 	rpc->pos += avail;