vout: opengl: GL_LUMINANCE* is deprecated starting opengl* 3
vout: opengl: GL_LUMINANCE* is deprecated starting opengl* 3

Use GL_RED/GL_R16 instead of GL_LUMINANCE/GL_LUMINANCE16.

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc