Only check write-timeouts when we have something to write.

asynnet.c

@@ -406,6 +406,8 @@ void ANETprocess(void)
       GetRWBufferData(connections[i].writeBuffer, &length);
       if (length > 0)
         FD_SET(socke, &writeMask);
+      else
+        connections[i].lastOpenForWrite = time(NULL);	
     }
     if (socke > count) {
       count = socke;