Use != 0 instead of > 0

[code423n4]

Handle

mics

Vulnerability details

Using != 0 is slightly cheaper than > 0.
see code-423n4/2021-12-maple-findings#75 for similar issue.

    OpenLevV1.sol, 454: change 'buyAmount > 0' to 'buyAmount != 0'
    OpenLevV1Lib.sol, 112: change 'marginLimit > 0' to 'marginLimit != 0'
    OpenLevV1.sol, 424: change 'balance > 0' to 'balance != 0'
    UniV2Dex.sol, 207: change 'reserveIn > 0' to 'reserveIn != 0'
    ControllerV1.sol, 342: change 'supplyAmount > 0' to 'supplyAmount != 0'
    UniV3Dex.sol, 165: change 'amount0Delta > 0' to 'amount0Delta != 0'
    OpenLevV1Lib.sol, 276: change 'totalShare > 0' to 'totalShare != 0'
    XOLE.sol, 266: change '_value > 0' to '_value != 0'
    ControllerV1.sol, 363: change 'borrowAmount > 0' to 'borrowAmount != 0'

[ColaM12]

Goode point, but not a bug.

[0xleastwood]

Only an issue because the comparison is made in a conditional statement. Typically this will not save gas.