[Groff] Hdtbl rowspan bug

[Barry Nisly]

Greetings,

I've been playing with the hdtbl macros and I noticed this anomaly. I'm using 
groff 1.18.1 (the latest via cygwin). Here's the input:

.TBL cols=2
.TR
.TD January rowspan=2 .TD 1
.TR
.TD 2
.TR
.TD February rowspan=2 .TD 3
.TR
.TD 4  
.TR
.TD March rowspan=2 .TD 5
.TR
.TD 6  
.ETB

You'll notice that none of the rows in the first column are spanned correctly. 
Since it's not part of the groff distribution, I'm emailing this list instead 
of the bug-groff list.

Thanks,
Barry

bug.ps
Description: PostScript document