More stupid Microsoft ctype assertion avoidance.

src/sbbs3/putmsg.cpp

@@ -8,7 +8,7 @@
  * @format.tab-size 4		(Plain Text/Source Code File Header)			*
  * @format.use-tabs true	(see http://www.synchro.net/ptsc_hdr.html)		*
  *																			*
- * Copyright 2011 Rob Swindell - http://www.synchro.net/copyright.html		*
+ * Copyright 2013 Rob Swindell - http://www.synchro.net/copyright.html		*
  *																			*
  * This program is free software; you can redistribute it and/or			*
  * modify it under the terms of the GNU General Public License				*
@@ -81,7 +81,7 @@ char sbbs_t::putmsg(const char *buf, long mode)
 			if(str[l+1]=='"' && !(sys_status&SS_NEST_PF)) {  /* Quote a file */
 				l+=2;
 				i=0;
-				while(i<(int)sizeof(tmp2)-1 && isprint(str[l]) && str[l]!='\\' && str[l]!='/')
+				while(i<(int)sizeof(tmp2)-1 && isprint((unsigned char)str[l]) && str[l]!='\\' && str[l]!='/')
 					tmp2[i++]=str[l++];
 				tmp2[i]=0;
 				sys_status|=SS_NEST_PF; 	/* keep it only one message deep! */
@@ -101,14 +101,14 @@ char sbbs_t::putmsg(const char *buf, long mode)
 			l++; 
 		}
 		else if(cfg.sys_misc&SM_PCBOARD && str[l]=='@' && str[l+1]=='X'
-			&& isxdigit(str[l+2]) && isxdigit(str[l+3])) {
+			&& isxdigit((unsigned char)str[l+2]) && isxdigit((unsigned char)str[l+3])) {
 			sprintf(tmp2,"%.2s",str+l+2);
 			attr(ahtoul(tmp2));
 			exatr=1;
 			l+=4; 
 		}
 		else if(cfg.sys_misc&SM_WILDCAT && str[l]=='@' && str[l+3]=='@'
-			&& isxdigit(str[l+1]) && isxdigit(str[l+2])) {
+			&& isxdigit((unsigned char)str[l+1]) && isxdigit((unsigned char)str[l+2])) {
 			sprintf(tmp2,"%.2s",str+l+1);
 			attr(ahtoul(tmp2));
 			// exatr=1;
@@ -129,7 +129,7 @@ char sbbs_t::putmsg(const char *buf, long mode)
 			exatr=1;
 			l+=3;	/* Skip |xx */
 		}	
-		else if(cfg.sys_misc&SM_CELERITY && str[l]=='|' && isalpha(str[l+1])
+		else if(cfg.sys_misc&SM_CELERITY && str[l]=='|' && isalpha((unsigned char)str[l+1])
 			&& !(useron.misc&(RIP|WIP))) {
 			switch(str[l+1]) {
 				case 'k':