Cleanup of memory vs. GC sizes. No functional changes.
x86: Fix argument checks for ipairs() iterator.
Cleanup of TValue setters. No functional changes.
Merge branch 'master' into v2.1
Fix corner case in string to number conversion.
ARM: Fix excess stack growth in interpreter.
ARM: Fix write barrier check in BC_USETS.
PPC: Fix excess stack growth in interpreter.
MIPS: Fix excess stack growth in interpreter.
DynASM/ARM: Fix rollback for variant templates.
Merge branch 'master' into v2.1
DynASM/ARM64: Various fixes.