feat(tvm): compare dataword in mcopy energy cost

Author: Liulei

actuator/src/main/java/org/tron/core/vm/EnergyCost.java

@@ -1,7 +1,5 @@
 package org.tron.core.vm;
 
-import static org.tron.common.math.Maths.max;
-
 import java.math.BigInteger;
 import org.tron.common.runtime.vm.DataWord;
 import org.tron.core.vm.config.VMConfig;
@@ -248,9 +246,9 @@ public static long getMCopyCost(Program program) {
     Stack stack = program.getStack();
     long oldMemSize = program.getMemSize();
 
-    int dstOffset = stack.peek().intValue();
-    int srcOffset = stack.get(stack.size() - 2).intValue();
-    DataWord maxOffset = new DataWord(max(dstOffset, srcOffset, VMConfig.allowStrictMath2()));
+    DataWord dstOffset = stack.peek();
+    DataWord srcOffset = stack.get(stack.size() - 2);
+    DataWord maxOffset = dstOffset.compareTo(srcOffset) > 0 ? dstOffset : srcOffset;
     return VERY_LOW_TIER + calcMemEnergy(oldMemSize,
         memNeeded(maxOffset, stack.get(stack.size() - 3)),
         stack.get(stack.size() - 3).longValueSafe(), Op.MCOPY);

actuator/src/main/java/org/tron/core/vm/repository/RepositoryImpl.java

@@ -456,7 +456,7 @@ public byte[] getTransientStorageValue(byte[] address, byte[] key) {
     byte[] value;
     if (parent != null) {
       value = parent.getTransientStorageValue(address, key);
-    } else{
+    } else {
       value = null;
     }