uncomment assert (opcode <=4)

src/libcoreint/interpreter.c

@@ -49,8 +49,7 @@ void
 init_int ()
 {
 #define INIT_OP_FUNC(name) __opfuncs[ name ] = opfunc_##name ;
-  // FIXME
-  // JERRY_STATIC_ASSERT (sizeof (OPCODE) <= 4);
+  JERRY_STATIC_ASSERT (sizeof (OPCODE) <= 4);
 
   OP_LIST (INIT_OP_FUNC)
 }

src/libcoreint/interpreter.h

@@ -31,10 +31,10 @@ opfunc __opfuncs[LAST_OP];
 
 struct __int_data
 {
-  int pos;
+  int pos; /**< current opcode to execute */
   ecma_Object_t *pThisBinding; /**< this binding for current context */
   ecma_Object_t *pLexEnv; /**< current lexical environment */
-  int *root_op_addr;
+  int *root_op_addr; /**< pointer to first opcode saved */
 };
 
 void gen_bytecode (void);