Resolve warnings as a result of last commit

More 'long int' purging.

src/sbbs3/chat.cpp

@@ -1248,7 +1248,7 @@ int sbbs_t::getnodetopage(int all, int telegram)
 {
 	char	str[128];
 	char 	tmp[512];
-	uint 	i,j;
+	int 	i,j;
 	node_t	node;
 
 	if(!lastnodemsg)

src/sbbs3/readmail.cpp

@@ -47,7 +47,7 @@ void sbbs_t::readmail(uint usernumber, int which, int lm_mode)
 	int		i;
 	uint32_t u,v;
 	int		mismatches=0,act;
-	uint	unum;
+	int		unum;
     int    l,last_mode;
 	uint	last;
 	bool	replied;

src/sbbs3/str.cpp

@@ -33,7 +33,7 @@ void sbbs_t::userlist(int mode)
 	char *	line[2500];
 	user_t	user;
 
-	if(lastuser(&cfg)<=(sizeof(line)/sizeof(line[0])))
+	if(lastuser(&cfg)<=(int)(sizeof(line)/sizeof(line[0])))
 		sort=yesno(text[SortAlphaQ]);
 	if(sort) {
 		bputs(text[CheckingSlots]); 

src/sbbs3/un_qwk.cpp

@@ -45,7 +45,7 @@ bool sbbs_t::unpack_qwk(char *packet,uint hubnum)
 	uchar	block[QWK_BLOCK_LEN];
 	int 	k,file;
 	uint	i,j,n,lastsub=INVALID_SUB;
-	uint	usernum;
+	int		usernum;
 	uint	blocks;
 	long	l,size,misc;
 	ulong	t;

src/sbbs3/useredit.cpp

@@ -41,10 +41,10 @@ void sbbs_t::useredit(int usernumber)
 	char 	tmp[512];
 	char	search[256]={""},artxt[128]={""};
 	uchar	*ar=NULL;
-	uint	i,j,k;
+	int		i,j,k;
 	float	f;
-	long	l;
-	long	kmode = K_LINE|K_EDIT|K_AUTODEL|K_TRIM;
+	int		l;
+	int		kmode = K_LINE|K_EDIT|K_AUTODEL|K_TRIM;
 	int64_t adj;
 	user_t	user;
 	struct	tm tm;