Removed all the cases of sys_errlist[], no one should be using that
today. Also, correct code generation so that declarations like
'Widget w = NULL; Pixmap p = NULL;' etc, aren't produced, which is
wrong. Use '0', not NULL for these.
This should also correct the 2 mis-definitions of Pixmap that commit
6a9327f2ab attempted to fix in ttsnoop.
dtappbuilder still needs a lot of work.