Add platform specific defintions for LINEBREAK (these came from nsMsgLineBuffer)

mailnews/base/public/msgCore.h

@@ -84,3 +84,18 @@ NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_MAILNEWS, value)
 
 #define NS_MSG_MESSAGE_NOT_FOUND NS_MSG_GENERATE_FAILURE(8)
 #define NS_MSG_NOT_A_MAIL_FOLDER NS_MSG_GENERATE_FAILURE(9)
+
+#ifdef XP_MAC
+#  define LINEBREAK             "\015"
+#  define LINEBREAK_LEN 1
+#else
+#  ifdef XP_WIN
+#    define LINEBREAK           "\015\012"
+#    define LINEBREAK_LEN       2
+#  else
+#    ifdef XP_UNIX
+#      define LINEBREAK         "\012"
+#      define LINEBREAK_LEN     1
+#    endif /* XP_UNIX */
+#  endif /* XP_WIN */
+#endif /* XP_MAC */