Change qhub_t mode and days to an unsigned 8-bit int

Resolve the QWKnet hub 'days' key in msgs.ini being written as -1

src/sbbs3/scfg/scfgnet.c

@@ -54,7 +54,7 @@ bool new_qhub_sub(qhub_t* qhub, unsigned subnum, sub_t* sub, unsigned confnum)
 {
 	if((qhub->sub=realloc(qhub->sub, sizeof(*qhub->sub)*(qhub->subs+1)))==NULL
 		|| (qhub->conf=(ushort *)realloc(qhub->conf, sizeof(*qhub->conf)*(qhub->subs+1)))==NULL
-		|| (qhub->mode=(char *)realloc(qhub->mode, sizeof(*qhub->mode)*(qhub->subs+1)))==NULL) {
+		|| (qhub->mode=(uchar *)realloc(qhub->mode, sizeof(*qhub->mode)*(qhub->subs+1)))==NULL) {
 		/* ToDo: report error */
 		return false;
 	}

src/sbbs3/scfgdefs.h

@@ -320,11 +320,11 @@ typedef struct {							/* Generic Timed Event */
 
 typedef struct {							/* QWK Network Hub */
 	char		id[LEN_QWKID+1],			/* System ID of Hub */
-				*mode,						/* Mode for Ctrl-A codes for ea. sub */
-				days,						/* Days to call-out on */
 				call[LEN_CMD+1],			/* Call-out command line to execute */
 				pack[LEN_CMD+1],			/* Packing command line */
 				unpack[LEN_CMD+1];			/* Unpacking command line */
+	uint8_t		*mode,						/* Mode for Ctrl-A codes for ea. sub */
+				days;						/* Days to call-out on */
 	char		fmt[MAX_FILEEXT_LEN+1]; 	/* Archive format */
 	uint16_t	time,						/* Time to call-out */
 				node,						/* Node to do the call-out */

src/sbbs3/scfglib1.c

@@ -531,7 +531,7 @@ BOOL read_msgs_cfg(scfg_t* cfg, char* error, size_t maxerrlen)
 				return allocerr(error, maxerrlen, fname, "qhub sub", sizeof(sub_t)*k);
 			if((cfg->qhub[i]->conf=(ushort *)malloc(sizeof(ushort)*k))==NULL)
 				return allocerr(error, maxerrlen, fname, "qhub conf", sizeof(ushort)*k);
-			if((cfg->qhub[i]->mode=(char *)malloc(sizeof(char)*k))==NULL)
+			if((cfg->qhub[i]->mode=(uchar *)malloc(sizeof(uchar)*k))==NULL)
 				return allocerr(error, maxerrlen, fname, "qhub mode", sizeof(uchar)*k);
 		}