Do conversion in a more easier to read and working way for \r, \n, and \t. (issue #8324 reported by johnlange)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@47398 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_voicemail.c

@@ -7398,13 +7398,17 @@ static int load_config(void)
 			tmpread = tmpwrite = emailbody;
 			while ((tmpwrite = strchr(tmpread,'\\'))) {
 				switch (tmpwrite[1]) {
+				case 'r':
+					memmove(tmpwrite + 1, tmpwrite + 2, strlen(tmpwrite + 2) + 1);
+					*tmpwrite = '\r';
+					break;
 				case 'n':
-					*tmpwrite++ = '\n';
-					memmove(tmpwrite, tmpwrite + 1, strlen(tmpwrite + 1) + 1);
+					memmove(tmpwrite + 1, tmpwrite + 2, strlen(tmpwrite + 2) + 1);
+					*tmpwrite = '\n';
 					break;
 				case 't':
-					*tmpwrite++ = '\t';
-					memmove(tmpwrite, tmpwrite + 1, strlen(tmpwrite + 1) + 1);
+					memmove(tmpwrite + 1, tmpwrite + 2, strlen(tmpwrite + 2) + 1);
+					*tmpwrite = '\t';
 					break;
 				default:
 					ast_log(LOG_NOTICE, "Substitution routine does not support this character: %c\n", tmpwrite[1]);
@@ -7422,13 +7426,17 @@ static int load_config(void)
 			tmpread = tmpwrite = pagerbody;
 			while ((tmpwrite = strchr(tmpread, '\\'))) {
 				switch (tmpwrite[1]) {
+				case 'r':
+					memmove(tmpwrite + 1, tmpwrite + 2, strlen(tmpwrite + 2) + 1);
+					*tmpwrite = '\r';
+					break;
 				case 'n':
-					*tmpwrite++ = '\n';
-					memmove(tmpwrite, tmpwrite + 1, strlen(tmpwrite + 1) + 1);
+					memmove(tmpwrite + 1, tmpwrite + 2, strlen(tmpwrite + 2) + 1);
+					*tmpwrite = '\n';
 					break;
 				case 't':
-					*tmpwrite++ = '\t';
-					memmove(tmpwrite, tmpwrite + 1, strlen(tmpwrite + 1) + 1);
+					memmove(tmpwrite + 1, tmpwrite + 2, strlen(tmpwrite + 2) + 1);
+					*tmpwrite = '\t';
 					break;
 				default:
 					ast_log(LOG_NOTICE, "Substitution routine does not support this character: %c\n", tmpwrite[1]);