Convert all consecutive calls to d7_DrawPrimitive(TRIANGLE_FAN) into a single call to d7_DrawPrimitive(TRIANGLE_LIST) with all the vertices.
Note, it *increase* the number of vertices, but bandwith is much less costly than multiple calls.
Note, only a very precise subset of the calls get buffered in order to ensure that the disruption is minimal.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=33814
-- v3: ddraw: Add local buffer in d3d_device7_DrawPrimitive()