[TRIVIAL PATCH 2.4] rivafb & 16 bit

[Paweł Goleniowski]

There is a problem with 16 bit mode with rivafb. Colors are sometimes broken 
(specialy under Midnight Commander). This small patch fixes it. I've been 
using it for last months and it works without any problems.

Pawel 'Goldi' Goleniowski
--- linux/drivers/video/riva/accel.c	2003-12-22 22:46:27.000000000 +0100
+++ linux/drivers/video/riva/accel.c	2003-12-22 19:47:19.000000000 +0100
@@ -300,8 +300,8 @@
 
 static inline void convert_bgcolor_16(u32 *col)
 {
-	*col = ((*col & 0x00007C00) << 9)
-             | ((*col & 0x000003E0) << 6)
+	*col = ((*col & 0x0000F800) << 8)
+             | ((*col & 0x000007E0) << 5)
              | ((*col & 0x0000001F) << 3)
              |          0xFF000000;
 }