* lisp.h:

* lisp.h:
* w32heap.c:
* emacs.c:
* alloc.c: Replace all references of NO_UNION_TYPE with
USE_LISP_UNION_TYPE.

* m/xtensa.h (NO_UNION_TYPE):
* m/vax.h (NO_UNION_TYPE):
* m/template.h (NO_UNION_TYPE):
* m/sparc.h (NO_UNION_TYPE):
* m/mips.h (NO_UNION_TYPE):
* m/macppc.h (NO_UNION_TYPE):
* m/m68k.h (NO_UNION_TYPE):
* m/iris4d.h (NO_UNION_TYPE):
* m/intel386.h (NO_UNION_TYPE):
* m/ibms390x.h (NO_UNION_TYPE):
* m/ibms390.h (NO_UNION_TYPE):
* m/ibmrs6000.h (NO_UNION_TYPE):
* m/ia64.h (NO_UNION_TYPE):
* m/hp800.h (NO_UNION_TYPE):
* m/arm.h (NO_UNION_TYPE):
* m/amdx86-64.h (NO_UNION_TYPE):
* m/alpha.h (NO_UNION_TYPE): Remove definition, all platform were
defining it the same.