Previously when lifting memory from a loop using the EMR optimisation,
the EMRL would add a new vardec and pass the avis to the recursive
loop call, *but* did not create an assign. With recent changes to how
WLTR is applied, this led to crashs in SSATransform.c. With this
commit we correctly create an assignment for the EMR lifted memory.

Additionally we disable EMLR optimisation for EMR lifted avis, as this
creates a redundent fill/noop operation which makes the generated code
a bit messy.