Patch for bug #29126

[Baron Schwartz]

The attached patch is against 5.0.38, but seems to apply OK on 5.0.45 
sources as well (though I've only built 5.0.38 with it).

I understand this patch has very little chance of being applied to the 
server, but I'm still interested in whether my code is any good.  Even 
coding style critiques are welcomed.  I'm grateful for any time anyone 
spends looking at this.

Regards
Baron

Attachment: [text/x-patch] mysql_5.0.38_bug_29126.patch