int10: Degrade the checksum warning to X_INFO.

I've seen about one case in three years where this has actually been
correlated with the real cause of failure, and we've trained people to
freak out about X_WARNING, so let's be less alarmist.

hw/xfree86/int10/helper_mem.c

@@ -253,7 +253,7 @@ int10_check_bios(int scrnIndex, int codeSeg, const unsigned char* vbiosMem)
 	return FALSE;
 
     if (bios_checksum(vbiosMem, size))
-	xf86DrvMsg(scrnIndex, X_WARNING, "Bad V_BIOS checksum\n");
+	xf86DrvMsg(scrnIndex, X_INFO, "Bad V_BIOS checksum\n");
 
     return TRUE;
 }