codea: Cover multidimensional arrays
codea: Fix stupid bug, adjust to lacuno's naming

I forgot to specify the type of f, so it was interepreted as
an int (32 bit) effectifely cutting the high bytes on return.
codea: Add some trivial multiplication
Modify flo's multi_def to cover a bug in my compiler.
Small fixes
Fix array types and multiple returns
codea: Fix multiple RETs
Added test cases for ag and codea
CodeB: If without else block
Simple while loop. It's constant condition is false so it is omitted
Using not for two constants
Less than comparison calls with constants
Constant if clauses with else blocks
codeb compilertests
Added codeb tests
variable definitions
Many variables
Add codeb test-cases
Remove debug
Writing to a non-const array index