Save function doesn't work if the path length exceeds 248 characters

[nyszilard]

WinMerge version: 2.16.30.0 (X64)
OS: Win10 1909 (build number: 18363.2274)

The program indicates that the save was successful when I click on the save icon, but in reality, it doesn't actually happen.

Test paths (with 249 characters):
c:\Test\Test2\Test3\Test4\Test5\Test6\Test7\Test8\Test9\LongerPathName1\LongerPathName2\LongerPathName3\LongerPathName4\LongerPathName5\testFileNameOneTwoThreeFourFiveSixSevenEightNineTenQWERTZUIOPASDFGHJKLYXCVBNMQWERTZUIOPASDFGHJKLYXCVBNMQWSCA.json

c:\Test\Test2\Test3\Test4\Test5\Test6\Test7\Test8\Test9\LongerPathName1\LongerPathName2\LongerPathName3\LongerPathName4\LongerPathName5\testFileNameOneTwoThreeFourFiveSixSevenEightNineTenQWERTZUIOPASDFGHJKLYXCVBNMQWERTZUIOPASDFGHJKLYXCVBNMQWSCB.json

[sdottaka]

Fixed in commit 3c2e135
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