We insert dummy empty elements into crange and leak vmas in radix.

Otherwise a const markptr isn't all that useful.

Slightly easier to read.

I have a sucky assembler apparently

The gcc docs say use "memory" if "your assembler instructions access
memory in an unpredictable fashion".  I don't know what that means,
but linux adds "memory" for similar inlines.  The gcc docs say use
"cc" if "assembler instruction can alter the condition code
register".  I know what that means, but linux doesn't use it.

This improves forexecbench performance on josmp by about 18%.  Now
steal_nonexec = 0 seems to have no affect or maybe a small negative
affect.

add "EXCEPTIONS := n" to config.mk

handle out-of-memory situations without requiring memory allocation.

(links, but crashes if an exception is thrown).

explicitly add gcc's own headers for stdarg.h