dtmail: Resolve uninitialized warnings

cde/programs/dtmail/libDtMail/Common/DtMailError.C

@@ -404,7 +404,7 @@ char *
 DtMailEnv::getMessageText(int set, int msg, char *dft)
 {
     static int oneTimeFlag = 0;	// Only attempt to open message catalog once
-    char *message;
+    char *message = NULL;
     
     if ((oneTimeFlag == 0) && (_errorCatalog == (nl_catd) -1))
     {

cde/programs/dtmail/libDtMail/RFC/MIMEPartial.C

@@ -108,7 +108,7 @@ getNamedValueString(const char *string, const char *name)
 {
   int		  	  stringLen = strlen(string);
   int		  	  nameLen = strlen(name);
-  const char		* results;
+  const char		* results = NULL;
   char			* stringEnd;
   unsigned int	  offset;
 

cde/programs/dtmail/libDtMail/RFC/RFCBodyPart.C

@@ -420,6 +420,7 @@ RFCBodyPart::flagIsSet(DtMailEnv & error,
 
       default:
 	error.setError(DTME_OperationInvalid);
+	return(DTM_FALSE);
     }
 
     return(answer);

cde/programs/dtmail/libDtMail/RFC/RFCMailValues.C

@@ -381,6 +381,8 @@ RFCValue::toDate(void)
     const char *token_end[12];
     int	n_tokens = 0;
 
+    token_end[0] = NULL;
+
     // Look for the end of each token. Date tokens are white space
     // separated.
     while (*pos) {
@@ -407,7 +409,7 @@ RFCValue::toDate(void)
     // Some dates will have a comma after the day of the week. We
     // want to remove that. It will always be the first token if
     // we have the day of the week.
-    if (*token_end[0] == ',') {
+    if (token_end[0] && *token_end[0] == ',') {
 	token_end[0]--;
     }