fix: texture coord mask in triangle rendering

[Cerwym]

all texture coord cals… wrap in 32 row texture boundary.

The calculation to remap texture coords is exacerbated my looking at things with sharp angles, that are textured and while the player is in possession of a minion

[Copilot]

Pull request overview

This PR fixes a texture coordinate overflow issue in the trig_render_md05 triangle rendering function by constraining the high byte of texture coordinates to a 32-row boundary. The fix addresses rendering artifacts that occur when viewing textured objects at sharp angles while the player possesses a minion.

Changes:

• Modified texture coordinate mask from 0xFF (8 bits, 0-255) to 0x1F (5 bits, 0-31) for the high byte (colH) in texture coordinate calculations
• Applied the fix to both the negative and non-negative point_x code paths in trig_render_md05

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