swr: Fix MSVC build
Fixes: e002f5a0 ("gallium: change pipe_vertex_element::src_format to uint8_t") Closes: #5550 (closed) Authored-by: @mareko
Fixes: e002f5a0 ("gallium: change pipe_vertex_element::src_format to uint8_t") Closes: #5550 (closed) Authored-by: @mareko