#77616. fix for some (of the many) asserts when importing mail. the assert is because the import

happens on a separate thread.  sr=bienvenu

mailnews/compose/src/nsMsgSend.cpp

@@ -133,7 +133,7 @@ UseQuotedPrintable(void)
 
 
 /* the following macro actually implement addref, release and query interface for our component. */
-NS_IMPL_ISUPPORTS1(nsMsgComposeAndSend, nsIMsgSend)
+NS_IMPL_THREADSAFE_ISUPPORTS1(nsMsgComposeAndSend, nsIMsgSend)
 
 nsMsgComposeAndSend::nsMsgComposeAndSend() : 
     m_messageKey(0xffffffff)

mailnews/import/eudora/src/nsEudoraCompose.cpp

@@ -135,7 +135,7 @@ public:
 };
 
 
-NS_IMPL_ISUPPORTS1( SendListener, nsIMsgSendListener)
+NS_IMPL_THREADSAFE_ISUPPORTS1(SendListener, nsIMsgSendListener)
 
 nsresult SendListener::CreateSendListener( nsIMsgSendListener **ppListener)
 {

mailnews/import/outlook/src/nsOutlookCompose.cpp

@@ -133,7 +133,7 @@ public:
 };
 
 
-NS_IMPL_ISUPPORTS1( SendListener, nsIMsgSendListener)
+NS_IMPL_THREADSAFE_ISUPPORTS1( SendListener, nsIMsgSendListener)
 
 nsresult SendListener::CreateSendListener( nsIMsgSendListener **ppListener)
 {