General cleanup - rename a few things, delete dead code.

bytecode.c

@@ -6,7 +6,7 @@
 #include "opcode.h"
 
 static int bytecode_operation_length(uint16_t* codeptr) {
-  if (opcode_describe(*codeptr)->flags & OP_HAS_VARIABLE_LENGTH_ARGLIST) {
+  if (*codeptr == CALL_JQ) {
     return 4 + codeptr[1] * 2;
   } else {
     return opcode_length(*codeptr);
@@ -41,7 +41,7 @@ void dump_operation(struct bytecode* bc, uint16_t* codeptr) {
   printf("%s", op->name);
   if (op->length > 1) {
     uint16_t imm = bc->code[pc++];
-    if (op->flags & OP_HAS_VARIABLE_LENGTH_ARGLIST) {
+    if (op->op == CALL_JQ) {
       for (int i=0; i<imm+1; i++) {
         uint16_t level = bc->code[pc++];
         uint16_t idx = bc->code[pc++];