Fix JUT_ASSERT and several other macros (#2711)

* Fix JUT_ASSERT to be a nested define

* Switch names that appear in asserts to be constants instead of defines

* Replace `0` in asserts with `NULL` or `FALSE`

* Fix fpclassify

* Fix ARRAY_SIZE

* Use G_CM3D_F_INF

* More fixes for fpclassify

* Remove FLOAT_LABEL

* Remove incorrect FLAG_ON macro

* Remove UNK_BSS macro

* Silence clangd unused header warning for PCH

src/d/actor/d_a_obj_lv4RailWall.cpp

@@ -3,7 +3,7 @@
  * 
 */
 
-#include "d/dolzel_rel.h"
+#include "d/dolzel_rel.h" // IWYU pragma: keep
 
 #include "d/actor/d_a_obj_lv4RailWall.h"
 #include "d/actor/d_a_obj_swspinner.h"
@@ -62,7 +62,7 @@ int daObjLv4Wall_c::Create() {
 /* 80C60CD0-80C60D40 0002D0 0070+00 1/0 0/0 0/0 .text            CreateHeap__14daObjLv4Wall_cFv */
 int daObjLv4Wall_c::CreateHeap() {
     J3DModelData* modelData = (J3DModelData*)dComIfG_getObjectRes(l_arcName, 4);
-    JUT_ASSERT(217, modelData != 0);
+    JUT_ASSERT(217, modelData != NULL);
     mpModel = mDoExt_J3DModel__create(modelData, J3DMdlFlag_DifferedDLBuffer, BMD_DEFAULT_DIFF_FLAGS);
     if (mpModel == NULL) {
         return 0;