d3d9/tests: Don't draw undefined data in stream_test().

dlls/d3d9/tests/visual.c

@@ -9306,8 +9306,7 @@ static void stream_test(IDirect3DDevice9 *device)
             hr = IDirect3DDevice9_SetStreamSource(device, act.strInstance, vb3, 0, sizeof(instancepos[0]));
             ok(hr == D3D_OK, "IDirect3DIndexBuffer9_Unlock failed with %08x (case %i)\n", hr, i);
 
-            /* don't know if this is right (1*3 and 4*1)*/
-            hr = IDirect3DDevice9_DrawIndexedPrimitive(device, D3DPT_TRIANGLELIST, 0, 0, 1 * 3 , 0, 4*1);
+            hr = IDirect3DDevice9_DrawIndexedPrimitive(device, D3DPT_TRIANGLELIST, 0, 0, 4, 0, 2);
             ok(hr == D3D_OK, "IDirect3DDevice9_DrawIndexedPrimitive failed with %08x (case %i)\n", hr, i);
             hr = IDirect3DDevice9_EndScene(device);
             ok(hr == D3D_OK, "IDirect3DDevice9_EndScene failed with %08x (case %i)\n", hr, i);