Only process network errors for clients that have nothing to read.

Closes #7.

ChangeLog.txt

@@ -1,6 +1,12 @@
 1.5.4 - 201810xx
 ================
 
+Broker:
+- Process all pending messages even when a client has disconnected. This means
+  a client that send a PUBLISH then DISCONNECT quickly, then disconnects will
+  have its DISCONNECT message processed properly and so no Will will be sent.
+  Closes #7.
+
 Library:
 - Fix memory leak that occurred if mosquitto_reconnect() was used when TLS
 errors were present. Closes #592.

src/loop.c

@@ -813,7 +813,7 @@ static void loop_handle_reads_writes(struct mosquitto_db *db, struct pollfd *pol
 					continue;
 				}
 			}while(SSL_DATA_PENDING(context));
-		}
+		}else{
 #ifdef WITH_EPOLL
 			if(events & (EPOLLERR | EPOLLHUP)){
 #else
@@ -823,6 +823,7 @@ static void loop_handle_reads_writes(struct mosquitto_db *db, struct pollfd *pol
 				continue;
 			}
 		}
+	}
 }