fix: #939 uint16_t in "getNumLines()" of UIGridLayout

[kokekanon]

Description

Behavior

Actual

Expected

Fixes

#939

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested

/goto The Lootmonger

hi
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Test Configuration:

• Server Version: 1100
• Client: pr
• Operating System:11

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I checked the PR checks reports
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works