Use an alternate fix for the complaint from clang's static analyzer
(about potentially derefencing a null pointer, which can't happen
here because alloc() panics and quits rather than return Null), plus
some reformatting and removal of a chunk of unused code (strncmpi).
Also a formatting bit for lev_comp.y, making sys/share/lev_yacc.c
be out of date. However, the generated code will be the same--except
for line numbers--so this shouldn't inhibit anybody's planned testing
waiting for the generated copy to be updated.
63dc6b3a31