Added error reporting to SB socket writes and call endSBSession if socket is dead when we try to send a message

plugins/Msn/extlib/phpmsnclass/msn.class.php

@@ -1455,6 +1455,7 @@ class MSN {
     private function sendMessageViaSB($to, $message) {
         $socket = $this->switchBoardSessionLookup[$to];
         if (self::socketcheck($socket)) {
+            $this->endSBSession($socket);
             return false;
         }
         
@@ -2566,25 +2567,31 @@ X-OIM-Sequence-Num: 1
      * @param resource $socket SB socket
      * @param integer $id Reference to SB id
      * @param string $data Line to write
-     * @return void
+     * @return mixed Bytes written or false on error
      */
     private function sb_writeln($socket, &$id, $data) {
-        @fwrite($socket, $data."\r\n");
+        $result = @fwrite($socket, $data."\r\n");
+        if ($result !== false) {
             $this->debug_message("SB: >>> $data");
             $id++;
         }
+        return $result;
+    }
 
     /**
      * Write data to given SB socket
      * 
      * @param resource $socket SB socket
      * @param $data Data to write to socket
-     * @return void
+     * @return mixed Bytes written or false on error
      */
     private function sb_writedata($socket, $data) {
-        @fwrite($socket, $data);
+        $result = @fwrite($socket, $data);
+        if ($result !== false) {
             $this->debug_message("SB: >>> $data");
         }
+        return $result;
+    }
 
     /**
      * Get all the sockets currently in use