Make memory sizes parameters

vm/stackframe.go

@@ -1,7 +1,5 @@
 package vm
 
-const FunctionMemorySize = 16
-
 type stackFrame struct {
 	previousFunctionIndex    int64
 	previousInstructionIndex int64
@@ -12,6 +10,6 @@ func newStackFrame(state *State) *stackFrame {
 	return &stackFrame{
 		previousFunctionIndex:    state.functionIndex,
 		previousInstructionIndex: state.instructionIndex,
-		functionMemory:           NewMemory(FunctionMemorySize),
+		functionMemory:           NewMemory(state.program.FunctionMemorySize),
 	}
 }