osmesa: Fixes building osmesa.c on windows
What does this MR do and why?
osmesa: Fixes building osmesa.c on windows
Fixes: 5bf68ab7013 ("osmesa: Make osmesa.h compatible with Windows SDK's GL.h")
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Closes: #10270 (closed)
Edited by Yonggang Luo