fix defaultbg value, solve sigfault
@@ -114,7 +114,7 @@ static const char *colorname[] = {
* foreground, background, cursor, reverse cursor
*/
unsigned int defaultfg = 12;
-unsigned int defaultbg = 256;
+unsigned int defaultbg = 257;
static unsigned int defaultcs = 14;
static unsigned int defaultrcs = 15;
