vgabios: Fix stdvga_perform_gray_scale_summing().

Fix conversion error that resulted in
stdvga_perform_gray_scale_summing not actually writing the new results
back.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/vgasrc/stdvga.c b/vgasrc/stdvga.c
index a29d6d47..1dd947e2 100644
--- a/vgasrc/stdvga.c
+++ b/vgasrc/stdvga.c
@@ -123,6 +123,7 @@ stdvga_perform_gray_scale_summing(u16 start, u16 count)
         u16 intensity = ((77 * rgb[0] + 151 * rgb[1] + 28 * rgb[2]) + 0x80) >> 8;
         if (intensity > 0x3f)
             intensity = 0x3f;
+        rgb[0] = rgb[1] = rgb[2] = intensity;
 
         stdvga_dac_write(GET_SEG(SS), rgb, i, 1);
     }