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_ni.cpp

@@ -4,7 +4,7 @@
 //
 
 
-#include "d/dolzel_rel.h"
+#include "d/dolzel_rel.h" // IWYU pragma: keep
 
 #include "d/d_msg_flow.h"
 #include "d/d_s_play.h"
@@ -2020,7 +2020,7 @@ static int daNi_Create(fopAc_ac_c* i_this) {
             a_this->mTimers[0] = 10;
         }
 
-        a_this->mSplGroundH = -1000000000.0f;
+        a_this->mSplGroundH = -G_CM3D_F_INF;
 
         daNi_Execute(a_this);
     }