--- bitmaps/sleft.xbm.orig	1994-12-17 21:41:34 UTC
+++ bitmaps/sleft.xbm
@@ -1,6 +1,6 @@
 #define sleft_width 16
 #define sleft_height 16
-static char sleft_bits[] = {
+static unsigned char sleft_bits[] = {
    0x00, 0x00, 0x00, 0x0c, 0x00, 0x0e, 0x00, 0x0f, 0x80, 0x0f, 0xc0, 0x0f,
    0xe0, 0x0f, 0xf0, 0x0f, 0xf0, 0x0f, 0xe0, 0x0f, 0xc0, 0x0f, 0x80, 0x0f,
    0x00, 0x0f, 0x00, 0x0e, 0x00, 0x0c, 0x00, 0x00};