radv: fix draw calls with 0-sized index buffers and robustness on NAVI10
The correct workaround is to bind an internal index buffer.
Fixes dEQP-VK.robustness.index_access.* in CTS 1.3.5.0 on NAVI10.
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The correct workaround is to bind an internal index buffer.
Fixes dEQP-VK.robustness.index_access.* in CTS 1.3.5.0 on NAVI10.