flag is sometimes set to -1 so needs to be signed
unsigned int offset can never be less than 0
unsigned int dep can never be less than 0
char will never be greater than 127
Revert "char will never be greater than 127"

This reverts commit 248fcf3bd7aea3cd499aac2c670e6c41c12a3b6b.
check if ascii codepoint is less than 0

ascii is a signed char so cannot be greater than 127
use MVMint8 to make this explicit
add wrapper functions to panic if allocation fails
replace malloc with MVM_malloc
replace free with MVM_free
replace realloc with MVM_realloc
fix bindattrs_*, implement getattrs_*, simplify getattr_*
implement coerce_In in the jit
implement div_In in the jit
Merge pull request #134 from carbin/now-you-can-panic

Panic if memory allocation fails, take 2
Merge pull request #132 from carbin/type-limits

Fix/remove comparisons that will always be true
fix the build on ARM 32 + gcc 4.8.2, lastofthe++
fix dynasm
pre-declare MVM_jit_support in moar.h; fixes #135
Better style on arg count errors

Inverted got/expected order, also s/parameters/arguments/.
Avoid unaligned reads on ARMv7

closes issue 137. Patch courtesy of throwaway-moar-arm++