Rename patty_ax25_sock_assembler_ready()

Rename patty_ax25_sock_assembler_ready() to assembler_pending() to
better fit naming conventions; ready() is meant more for "does this
channel have any I/O readiness conditions", whereas pending() is best
suited for "does this state machine have a frame pending receipt"

include/patty/ax25/sock.h

@@ -231,7 +231,7 @@ int patty_ax25_sock_assembler_init(patty_ax25_sock *sock, size_t total);
 
 void patty_ax25_sock_assembler_stop(patty_ax25_sock *sock);
 
-int patty_ax25_sock_assembler_ready(patty_ax25_sock *sock, size_t remaining);
+int patty_ax25_sock_assembler_pending(patty_ax25_sock *sock, size_t remaining);
 
 ssize_t patty_ax25_sock_assembler_save(patty_ax25_sock *sock,
                                        void *buf,

src/server.c

@@ -1607,7 +1607,7 @@ static int handle_segment(patty_ax25_server *server,
         }
     }
 
-    if (!patty_ax25_sock_assembler_ready(sock, remaining)) {
+    if (!patty_ax25_sock_assembler_pending(sock, remaining)) {
         patty_ax25_sock_assembler_stop(sock);
 
         goto reply_rej;

src/sock.c

@@ -481,7 +481,7 @@ error_invalid:
     return -1;
 }
 
-int patty_ax25_sock_assembler_ready(patty_ax25_sock *sock, size_t remaining) {
+int patty_ax25_sock_assembler_pending(patty_ax25_sock *sock, size_t remaining) {
     if (sock->assembler == NULL || sock->assembler->total == 0) {
         return 0;
     }