Fix case-sensitivity issue in charset element of path in last commit

fexistcase() only corrects the case of the filename, not the directories in
the path. So we'll just use the lowercase version of the charset string,
always.

Also, return false upon failure of any call to replace_text(), not just the
last one.

src/sbbs3/str.cpp

@@ -117,16 +117,24 @@ void sbbs_t::revert_text(void)
 bool sbbs_t::load_user_text(void)
 {
 	char path[MAX_PATH + 1];
+	char charset[16];
+
+	SAFECOPY(charset, term_charset());
+	strlwr(charset);
 	revert_text();
-	safe_snprintf(path, sizeof path, "%s%s/text.ini", cfg.ctrl_dir, term_charset());
-	if(fexistcase(path))
-		replace_text(path);
+	snprintf(path, sizeof path, "%s%s/text.ini", cfg.ctrl_dir, charset);
+	if (fexist(path)) {
+		if (!replace_text(path))
+			return false;
+	}
 	if (*useron.lang == '\0')
 		return true;
-	safe_snprintf(path, sizeof path, "%s%s/text.%s.ini", cfg.ctrl_dir, term_charset(), useron.lang);
-	if(fexistcase(path))
-		replace_text(path);
-	safe_snprintf(path, sizeof path, "%stext.%s.ini", cfg.ctrl_dir, useron.lang);
+	snprintf(path, sizeof path, "%s%s/text.%s.ini", cfg.ctrl_dir, charset, useron.lang);
+	if (fexist(path)) {
+		if (!replace_text(path))
+			return false;
+	}
+	snprintf(path, sizeof path, "%stext.%s.ini", cfg.ctrl_dir, useron.lang);
 	return replace_text(path);
 }