Fix, don't change codes constant, changed expected gas

Author: Agustin Aguilar

lib/opcodes.js

@@ -182,11 +182,13 @@ module.exports = function (op, full, freeLogs) {
     }
   }
 
+  var fee = code[1]
+
   if (freeLogs) {
     if (opcode === 'LOG') {
-      code[1] = 0
+      fee = 0
     }
   }
 
-  return {name: opcode, opcode: op, fee: code[1], in: code[2], out: code[3], dynamic: code[4], async: code[5]}
+  return {name: opcode, opcode: op, fee: fee, in: code[2], out: code[3], dynamic: code[4], async: code[5]}
 }

tests/api/freeLogs.js

@@ -20,7 +20,7 @@ tape('VM with free logs', async (t) => {
       gasLimit: 1000
     }, function (err, val) {
       st.notOk(err)
-      st.ok(val.runState.gasLeft >= 0x8e, 'should expend less gas')
+      st.ok(val.runState.gasLeft >= 0x235, 'should expend less gas')
       st.ok(val.logs.length === 1, 'should emit event')
       st.end()
     })
@@ -32,7 +32,7 @@ tape('VM with free logs', async (t) => {
       gasLimit: 1000
     }, function (err, val) {
       st.notOk(err)
-      st.ok(val.runState.gasLeft < 0x8e, 'should expend normal gas')
+      st.ok(val.runState.gasLeft < 0x235, 'should expend normal gas')
       st.ok(val.logs.length === 1, 'should emit event')
       st.end()
     })