Fixes CLIENT-198. The issue was that: Vertex buffer overflow occurs when m_maxTankTrackEdges is reduced, but active track objects still hold more edges than the new buffer capacity.

• Added null checks for the vertex buffer and its locked pointer to prevent crashes during device resets or failed buffer locks.
• Clamped activeEdgeCount to m_maxTankTrackEdges to prevent out-of-bounds writes to the vertex buffer and m_edges array.
• Ensured consistent use of the clamped activeEdgeCount during both vertex buffer population and drawing operations.

This fix was generated by Seer in Sentry, triggered by x64-dev. 👁️ Run ID: 13878311

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