[Bug #1497414] _self is a reserved word in the WATCOM 10.6 C compiler.
Fix by renaming the variable.

In a different module, Neal fixed it by renaming _self to self.  There's
already a variable named 'self' here, so I used selfptr.

(I'm committing this on a Mac without Tk, but it's a simple search-and-replace.
<crosses fingers>, so  I'll watch the buildbots and see what happens.)
1 file changed