put linebreak defines here since I can't put them in nsCRT.h

mailnews/base/src/nsMsgLineBuffer.cpp

@@ -19,6 +19,20 @@
 #include "msgcore.h"
 #include "nsMsgLineBuffer.h"
 
+#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 */
 
 nsMsgLineBuffer::nsMsgLineBuffer(nsMsgLineBufferHandler *handler, PRBool convertNewlinesP)
 {