swr/rast: Repair simd8 frontend code rot

Keep non-default simd8 frontend code running for comparison purposes.

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>
diff --git a/src/gallium/drivers/swr/rasterizer/core/frontend.cpp b/src/gallium/drivers/swr/rasterizer/core/frontend.cpp
index 2fe6cfc..5a61dc3 100644
--- a/src/gallium/drivers/swr/rasterizer/core/frontend.cpp
+++ b/src/gallium/drivers/swr/rasterizer/core/frontend.cpp
@@ -956,7 +956,7 @@
                 PA_STATE_CUT gsPa(pDC, (uint8_t*)pGsBuffers->pGsTransposed, numEmittedVerts, pState->outputVertexSize, reinterpret_cast<simd16mask *>(pCutBuffer), numEmittedVerts, numAttribs, pState->outputTopology, processCutVerts, pa.numVertsPerPrim);
 
 #else
-                PA_STATE_CUT gsPa(pDC, (uint8_t*)pGsBuffers->pGsTransposed, numEmittedVerts, pState->outputVertexSize, pCutBuffer, numEmittedVerts, numAttribs, pState->outputTopology, processCutVerts);
+                PA_STATE_CUT gsPa(pDC, (uint8_t*)pGsBuffers->pGsTransposed, numEmittedVerts, pState->outputVertexSize, pCutBuffer, numEmittedVerts, numAttribs, pState->outputTopology, processCutVerts, pa.numVertsPerPrim);
 
 #endif
                 while (gsPa.GetNextStreamOutput())