fix possible passing of signed int to function that only receives unsigned ints, CID 3491

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40870 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/drivers/network/wimax/usb_beceemwmx/Settings.cpp

@@ -34,7 +34,10 @@ void create_log()
 		return;
 
 	int flags = O_WRONLY | O_CREAT | ((gTruncateLogFile) ? O_TRUNC : 0);
-	close(open(gLogFilePath, flags, 0666));
+	int filehandle = open(gLogFilePath, flags, 0666);
+	if (filehandle >= 0)
+		close(filehandle);
+	}
 
 	mutex_init(&gLogLock, DRIVER_NAME"-logging");
 }