Segmentation fault when deleting TTYStream object

[Jens Theeß]

I get a segmentation fault when I delete an object derived from a
TTYStream.
The attached patch fix it.
System: commoncpp 1.1.8, SuSE 7.1, Linux 2.4.7 i686, gcc 2.95.3

Strangely, I got no segfault with commoncpp 1.1.1, though I can't see
the reason in the source.

Greetings,
Jens Theeß

--- commoncpp2-1.1.8/src/serial.cpp     Thu May 13 18:39:22 2004
+++ commoncpp2-1.1.8.patched/src/serial.cpp     Tue May 18 15:01:41 2004
@@ -277,7 +277,7 @@
        if(original)
                delete (DCB *)original;
 #else
-       if(dev < 0)
+       if(dev < 0 && original)
                tcsetattr(dev, TCSANOW, (struct termios *)original);
 
        if(current)