bugfix(w3ddisplay): Prevent crashes when texture data or filename is missing

[seer-by-sentry]

Fixes CLIENT-19P. The issue was that: Texture rendering crashes due to W3DDisplay::drawImage passing a null texture pointer to Render2DClass::Set_Texture without validation.

• Added null check for raw texture data before attempting to set the texture.
• Added empty string check for texture filename before attempting to set the texture.
• Prevents potential crashes or errors in W3DDisplay::Draw_Image if texture resources are unavailable or invalid.

This fix was generated by Seer in Sentry, triggered by x64-dev. 👁️ Run ID: 13978084

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