fix(EVM): Do not check memory boundaries if size is zero

[0xVolosnikov]

What ❔

Why ❔

Checklist

• PR title corresponds to the body of PR (we generate changelog entries from PRs).
• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.

[github-actions]

Coverage after merging evm-emulator/fix-memory-boundaries-check-for-zero-size into evm-emulator/fixes will be

86.78%

Coverage Report

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
contracts/bridge
L1ERC20Bridge.sol	81.82%	80%	75%	83.87%	62, 70, 70–71, 73–74
L1SharedBridge.sol	78.11%	63.89%	84.21%	81.58%	101–102, 109–110, 117–118, 125, 125–126, 133–134, 179–180, 194–195, 203–204, 216–217, 219–220, 231, 231, 231–235, 235–236, 238, 243–245, 245–246, 248–250, 250–251, 253, 265, 274, 274–275, 283–284, 286–287, 298–299, 454–455, 457–458, 589–590, 606–607, 617–618, 633–634, 730–731, 972, 977
contracts/bridgehub
Bridgehub.sol	89.29%	74.07%	100%	91.49%	100–101, 112–113, 132–133, 155–156, 158–159, 332–333, 49, 63–64
contracts/common
ReentrancyGuard.sol	90%	66.67%	100%	92.86%	78–79
contracts/common/libraries
L2ContractHelper.sol	42.86%	0%	50%	52.63%	25–26, 31–32, 35–36, 50, 52, 52–53, 57, 57–58, 66
SemVer.sol	100%	100%	100%	100%
UncheckedMath.sol	100%	100%	100%	100%
UnsafeBytes.sol	100%	100%	100%	100%
contracts/governance
ChainAdmin.sol	64.29%	50%	60%	68.42%	27–28, 39–40, 78, 78–79, 81
Governance.sol	91.67%	94.74%	95%	89.86%	45, 45–46, 49, 51–52, 54–55
contracts/state-transition
StateTransitionManager.sol	59.74%	35.71%	50%	65.74%	102, 107–111, 117, 150–151, 153–154, 156–157, 159–160, 202, 204–205, 210, 212, 212–213, 216–218, 220–221, 256, 276, 290, 295, 300, 305, 310, 315, 320, 395, 395–396, 399, 470–471, 80, 93, 93–94
TestnetVerifier.sol	44.44%	33.33%	50%	50%	16, 16, 16, 32
ValidatorTimelock.sol	95.89%	83.33%	100%	95.83%	241, 82–83
Verifier.sol	89.88%	35.71%	96.30%	90.93%	1673–1674, 287–302, 305–308, 311–318, 321–328, 331–332, 335–336, 339, 384–385, 395–396, 406–407, 417–418, 428–429, 444–445, 454, 454–455, 904–905
contracts/state-transition/chain-deps
DiamondInit.sol	78%	45.45%	100%	86.49%	34–35, 37–38, 40–41, 43–44, 46–47, 72
DiamondProxy.sol	92.31%	75%	100%	100%	16, 27
contracts/state-transition/chain-deps/facets
Admin.sol	86.21%	72.73%	92.31%	87.30%	109, 109–110, 112–113, 178, 180, 83–84, 94–95
Executor.sol	82.09%	63.41%	84.38%	87.95%	137–138, 192, 197, 202, 207, 212, 217, 222, 227, 230–231, 235–236, 240–242, 244–245, 260–261, 280, 294–295, 361–362, 425, 447–449, 469, 48, 48–49, 519–520, 528–529, 549, 556–557, 57, 59, 59–60, 619, 62, 620, 63, 646–647, 696–697, 70, 700–701, 71, 74–75, 775
Getters.sol	90.48%	100%	88.37%	91.67%	147, 216, 57, 77, 82
Mailbox.sol	100%	100%	100%	100%
ZkSyncHyperchainBase.sol	92.86%	85.71%	100%	92.86%	55–56
contracts/state-transition/libraries
Diamond.sol	93.33%	80.77%	100%	95.96%	109–110, 113, 115, 117, 120, 198–199, 316
LibMap.sol	100%	100%	100%	100%
Merkle.sol	100%	100%	100%	100%
PriorityQueue.sol	100%	100%	100%	100%
TransactionValidator.sol	94.44%	88.24%	100%	96%	66–67, 69–70
contracts/upgrades
BaseZkSyncUpgrade.sol	58.46%	29.17%	100%	60.22%	115, 115, 118, 121, 124–125, 137, 137, 140, 143, 146–147, 159, 159, 162, 165, 168–169, 183–185, 203–205, 252, 252, 255, 255, 272, 272, 289, 289, 292, 292, 297–299, 299, 311, 311, 318, 318, 325, 325, 333, 333, 338, 338, 348, 348, 351, 351, 81, 81
BaseZkSyncUpgradeGenesis.sol	56.67%	14.29%	100%	68.18%	25, 25–26, 33–34, 40–41, 52–53, 62–63, 65–66
DefaultUpgrade.sol	100%	100%	100%	100%
GenesisUpgrade.sol	100%	100%	100%	100%
contracts/vendor
AddressAliasHelper.sol	85.71%	75%	100%	85.71%	60, 62