Mps sort out baroque check macros (mainly config.h and check.h)

See job001248.  Should be source-only change.  Details:

  CheckNONE,SHALLOW,DEEP -->> CheckLevelMINIMAL,SHALLOW,DEEP
  [PROD_]CHECK_DEFAULT -->> [PROD_]CHECKLEVEL_INITIAL
  CHECK[_NONE] -->> AVER_AND_CHECK[_NONE]

And add some comments.

Copied from Perforce
 Change: 161210
 ServerID: perforce.ravenbrook.com

1 files changed, 3 insertions, 3 deletions

diff --git a/mps/code/mpm.c b/mps/code/mpm.c
index 247cbd05a56..3ce1aefe7ce 100644
--- a/mps/code/mpm.c
+++ b/mps/code/mpm.c
@@ -18,7 +18,7 @@
 SRCID(mpm, "$Id$");
 
 
-#if defined(CHECK)
+#if defined(AVER_AND_CHECK)
 
 
 /* CheckLevel -- Control check level 
@@ -26,7 +26,7 @@ SRCID(mpm, "$Id$");
  * This controls the behaviour of Check methods (see impl.h.check).
  */
 
-unsigned CheckLevel = CHECK_DEFAULT;
+unsigned CheckLevel = CHECKLEVEL_INITIAL;
 
 
 /* MPMCheck -- test MPM assumptions */
@@ -123,7 +123,7 @@ Bool AlignCheck(Align align)
 }
 
 
-#endif /* defined(CHECK) */
+#endif /* defined(AVER_AND_CHECK) */
 
 
 /* WordIsAligned -- test whether a word is aligned */