CogVM source as per VMMaker.oscog-eem.3503

StackInterpreter:

Fix for the StackInterpreter the regression in marryFrame: introduced
in VMMaker.oscog-eem.3456 fixed in VMMaker.oscog-eem.3471. To this end
add a more agressive assert to SpurMemoryManager>>
storePointerUnchecked:ofObject:withValue:.

Spur:
Fix two mistakes in processing old space ephemerons.
First, ephemerons in the unscannedEphemerons set are marked so to get
them to be traced one can't just call markAndTrace: theEphemeron. One
would need to unmark it, but better is to call
markLoopFrom: theEphemeron directly.
Second, numStrongSlotsOfInephemeral: was missing a case and answered
0 for ephemerons.

Because scavenging is done after marking, future space could
be larger than unused eden, so include it in the choices for
unscannedEphemerons.

Speed up flushMethodCacheFrom:to: for Spur. No need to test the class
field cuz the method cache contains class indexes, not class objects.

Speed up SpurMemoryManager>>addressCouldBeObj: by inlining isInOldSpace:.

Author: eliotmiranda

src/spur32.cog.lowcode/cointerp.c

@@ -1,5 +1,5 @@
 /* Automatically generated by
-	CCodeGeneratorGlobalStructure VMMaker.oscog-eem.3500 uuid: 125e4188-3517-4894-820f-fe57b485f930
+	CCodeGeneratorGlobalStructure VMMaker.oscog-eem.3503 uuid: dd5af38b-cb11-48d5-a1f2-d7a971b76f2c
 	(Compiler-eem.513)
  */